To match the pairs, let’s understand the terms:
- **Broad spectrum** antibiotics are effective against both Gram-positive and Gram-negative bacteria.
→ **Vancomycin** is a broad-spectrum antibiotic. Hence, A → II.
- **Typhoid** is caused by *Salmonella typhi*, which is treated using **Chloramphenicol**, known for its effectiveness.
→ B → IV.
- **Bactericidal** antibiotics kill bacteria directly. **Ofloxacin**, a fluoroquinolone, is a bactericidal agent.
→ C → V.
- **Bacteriostatic** antibiotics inhibit bacterial growth. **Erythromycin**, a macrolide, is bacteriostatic.
→ D → III.
So the correct matching is:
A – II, B – IV, C – V, D – III