Multi Drug Resistant (MDR) tuberculosis is defined as resistance to

Correct Answer: C

Rationale: MDR-TB is defined as resistance to isoniazid and rifampin, with or without resistance to other drugs.

Correct Answer: B

Rationale: Nystatin is the drug of choice for monilial (Candida) diarrhea, acting locally in the gut.

Correct Answer: D

Rationale: Fluconazole lacks the anti-androgenic side effects of ketoconazole due to less inhibition of steroidogenesis.

Correct Answer: A

Rationale: Herpes simplex type I is most susceptible to acyclovir due to its high sensitivity to viral thymidine kinase activation.

Correct Answer: D

Rationale: Antimetabolites act as false substrates in nucleic acid synthesis, disrupting DNA and RNA production.