Match the antibiotics in Group I with the microorganisms that produce them in Group II.

The correct matching of antibiotics in Group I with the microorganisms that produce them in Group II is as follows:
- Streptomycin (P): Produced by {Streptomyces griseus} (i).
- Bacitracin (Q): Produced by {Bacillus licheniformis} (ii).
- Amphotericin B (R): Produced by {Streptomyces nodosus} (iv).
- Chloramphenicol (S): Produced by {Streptomyces venezuelae} (iii).
Thus, the correct option is ( {(P)-(i), (Q)-(ii), (R)-(iv), (S)-(iii)} ), which corresponds to option (B).
| Group 1 | Group 2 | ||
| (P) | Streptomycin | (i) | Streptomyces griseus |
| (Q) | Bacitracin | (ii) | Bacillus licheniformis |
| (R) | Amphotericin B | (iii) | Streptomyces venezuelae |
| (S) | Chloramphenicol | (iv) | Streptomyces nodosus |

