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
[{'content': 'Drugs that crosses placenta is \nSelect and explain. \nA. Isoniazid, B. Rifampicin, C. Pyrazinamide, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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', 'role': 'assistant'}]