We are asked to match each bacteria with the infection it causes. Let's go through the options systematically.
- Staphylococcus aureus (P): Known to cause postoperative infections.
- Shigella sp. (Q): Causes diarrhoea.
- Neisseria sp. (R): Known for causing meningitis.
- Yersinia pestis (S): Causes plague.
Now, match the correct pairs:
- P → Postoperative infection (Option 3)
- Q → Diarrhoea (Option 4)
- R → Meningitis (Option 1)
- S → Plague (Option 2)
Thus, the correct combination is P-3; Q-4; R-1; S-2, which matches Option (C).