This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
Drugs that crosses placenta is 
Select and explain. 
A. Isoniazid, B. Rifampicin, C. Pyrazinamide, D. All
D: All
Answer: D: All 
Explanation: Reference KDT 6/e p748 All first line antitubercular drugs can cross placenta Streptomycin is contraindicated in pregnancy whereas other drugs are found to be safe