Biodiversity forms the basis for human existence in the following ways: 1. Soil formation 2. Prevention of soil erosion 3. Recycling of waste 4. Pollination of crops Select the correct answer using the codes given below.
A1, 2 and 3 only
B2, 3 and 4 only
C1 and 4 only
D1, 2, 3 and 4
Answer & Solution
Correct answer: D. 1, 2, 3 and 4
UPSC CSE Prelims 2011 (GS-I, Set A), Q.61. Official answer key: D.
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