Below is the solution for UPSC prelims general studies :

(General Studies) SET B:

1.  c (BRIT - Isotope Tech)
2. c (National Brain Research Centre - Gurgaon and fingerprinting centre - hyderabad)
3. a (desalination plant - Kavaratti)
4. b (Bretton Woods Conference)
5. b (Directive principles of state Policy)
6. b (Legislative assembly)
7. c (Ninety Second amendment)
8. d ( PSU of GoI - all 3)
9. d ( million plus cities - all 4)
10. a (CDM statement 1 only)
11. c ( World summit on Sustainable Development - Johannesberg)
12. d (K. P. Singh, Vikram Pandit.....)
13. d (Amnesty International, CIS...)
14. b (% rural population - himachal pradesh)
15. b ( Dec order of population - USA & Indonesia)
16. c ( Spoken max after hindi - Bengali)
17. b (Heavy Water - H. C. Urey)
18. c ( Kim Dae jung - South Korea)
19. d (Ogaden region - Ethiopia and Somalia)
20. a (Palitana Temple - Bhavnagar)
21. c (2004 Euro - Greece)
22. b (Jupiter and Saturn)
23. b (Cristina Kirchner - Argentina)
24. c (Rowlatt Act - Lord Chelmsford)
25. c (radioactive water leakage - Japan)
26. d (% of people over 65 years - 5-6%)
27. b (Spacecraft - Cassini)
28. b (ITER - Southern France)
29. c (Themis Mission)
30. b (Biosphere Reserve - Kanchenjunga)
31. b (agent orange - weed killing)
32. d (cabinet mission)
33. c (Free Indian Legion - S. C. Bose)
34. c (Prisoner's Dilemma - Game Theory)
35. b (East India Company - Jahangir)
36. c (refused knighthood - G. K. Gokhale)
37. d (Irrigation project by state - all 3)
38. b (Current power generation - installed and generation)
39. b (International Date Line - Bering Strait)
40. b (Waterfalls & Rivers)
41. d (Nearest to equator - Singapore)
42. b (Tehri Hydropower complex - Bhagirathi)
43. d ( Minerals in Chhattisgarh - all 4)
44. b (Theory/Law & Scientists - Albert Einstien)
45. a (Baudhayan theorem = Pythogoras theorem)
46. a (Sharing border with Moldova)
47. a (Asian Development bank & Colombo Plan)
48. c (Emirates of UAE - Ajman, Ras al-Khaimah(last))
49. b (largest areawise Lok Sabha constituency - Ladakh)
50. b (Median age of Population)
51. b (Person-Area : Sabyasachi Mukherjee,...)
52. b (Justice V. R. Krishna Iyer)
53. c (Ebraham Alkazi - Theatre training)
54. d (Chikmanglur/coffee, Mandya/sugar)
55. a (Bimbavati Devi -Manipuri)
56. c (Sarosh Zaiwalla - legal expert)
57. c (Tapovan & Vishnugarh - Uttarakhand)
58. c (Author/Work - Dinbandhu Mitra--Nil-darpan)
59. a (New Lamps for Old - Aurobindo Ghosh)
60. c (Un-British Rule in India - Dadabhai Naoroji)
61. a (egg laying mammal - echidna)
62. c (Mosquito - gambusia fish)
63. b (Scheduled areas in several states - fifth schedule)
64. b (Dept. of Border Management - Ministry of Home Affairs)
65. d (Verappa Moily - Administrative Reforms)
66. c (Elizabeth Hawley - Himalayan Expeditions)
67. c (States of India sharing coastline - 9)
68. d (James D Watson/Nobel Prize - Genetics)
69. b (Board - Headquarters ---- Tobacco board/guntur....)
70. a (max no. of national parks - Andaman & Nicobar)
71. c (Not an Ape - Langur)
72. d (5 identical balls - one in each row - 108)
73. a (exactly 5 letters in 6 envelopes - zero)
74. c (identical red, black and white balls in cells - 24)
75. a (how many diff triangles - 28)
76. d (Francis Collins)
77. d (S & P 500)
78. b (Rajiv Gandhi National flying institute)
79. c (Saurav Ganguly)
80. b (Faiz Ahmed Faiz)
81. c (180*10^7)
82. c (Equal to R)
83. b (Narmada)
84. d (Nuclear supplier's group)
85. c (Advanced Light helicopter)
86. a (hand-in-hand china)
87. c (Liver)
88. d (Visible spectrum)
89. b (radio waves)
90. a (congress ministries)
91. b (french open)
92. b (malta)
93. c (mahendragiri)
94. c (Service/Agency - country)
95. b (C Rangarajan)
96. c  (7.35-7.45)
97. b (Vice-Precident)
98. b (Kurnool)
99. d (India semi-final)
100. a (Namchik-namphuk)
101. a (Norman Ernest Borlaug - UAE)
102. c (Yom kippur War)
103. c (probiotic food)
104. c (Albedo)
105. c (A.N.ray - CJI . Nagendra singh- cec)
106. b (Pitcher plant)
107. d (king cobra)
108. c (Spider)
109. b ( High courts-3)
110. c (Livestock population - India)
111. d (Crocodile)
112. d (Tributary river-Main River)
113. c ( Nilgiri)
114. b (Mahogany)
115. d (Number of spokes)
116. d (source of methane)
117. a (Barak - Israel)
118. c (Selene-1)
119. d (Rig-veda)
120. a (Orange prize)
121. b (I)
122. b (Number of terms - 73)
123. b (4 books-12)
124. c (Carpenter)
125. c (100 pens at discount of 10%-862.50)
126. c (school teacher-10)
127. a (600)
128. c (Bisphenol)
129. d (GDP)
130. b (March 1 2008 friday)
131. b (electrification policy)
132. c (2045)
133. d (Biodiesel mission)
134. d (National old age pension)
135. c (Swayamsiddha)
136. c ( M D C L)
137. c (William henry bragg)
138. b (Lal bahadur shastri)
139. d (Sikkim - minimum population Census of india 2001)
140. c (jet engine and rocket)
141. a (Dye laser printer)
142. a (Musical scale sa ni)
143. b (Rubies and sapphires - Aluminium oxide)
144. c (Stranger gas-Xenon)
145. c (Methane and air- explosion in mines)
146. b (Lithium and osmium)
147. b (one barrel of oil - 159 litres)
148. c (J.B. Kriplani)
149. a (Al-Hilal)
150. b (Bombay-First Session of INC)