Match Column-I with Column-II. array llll ; & Column-I & ; & Column-II (a) & Nitrococcus & (i) & Denitrification (b) & Rhizobium & (ii) & Conversion of ammonia to nitrite (c) & Thiobacillus & (iii) & Conversion of nitrite to nitrate (d) & Nitrobacter & (iv) & Conversion of atmospheric nitrogen to ammonia array Choose the correct answer from options given below.

1. A. a-i, b-ii, c-iii, d-iv
2. B. a-iii, b-i, c-iv, d-ii
3. C. a-iv, b-iii, c-ii, d-i
4. D. a-ii, b-iv, c-i, d-iii

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