Match the following
| Column-I |
Column-II |
| (P) Cynobacteria |
(i) N2 -fixation |
| (Q) Pseudomonas |
(ii) Bio gas |
| (R) Rhizobium |
(iii) Bio fertilisersin peddy fields |
| (S) Methenogens |
(iv) Quantam-4000 |
(a) (R-i) (S-ii) (Q-iii) (P-iv)
(b) (S-i) (Q-ii) (P-iii) (R-iv)
(c) (R-i) (P-ii) (S-iii) (Q-iv)
(d) (R-i) (S-ii) (P-iii) (Q-iv)
