This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy: General Principles, Subject name: Pharmacology
[{'content': 'Drug that crosses placenta is: \nSelect and explain. \nA. Isoniazid, B. Rifampicin, C. Pyrazinamide, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (D) All(Ref: KDT 18th/e p818-819)All first line antitubercular drugs can cross placenta. Streptomycin is contraindicated in preganancy whereas other drugs are found to be safe.', 'role': 'assistant'}]