This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Excessive intake (hypervitaminosis) of which of the following vitamin is associated with increased risk of congenital malformations - \nSelect and explain. \nA. Vitamin-A, B. Biotin, C. Folic acid, D. Vitamin-K', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Vitamin A o It is absolutely contraindicated in pregnancy, as it is highly teratogenic; upto 25% exposed foetuses had bih defects-craniofacial, hea, and CNS abnormalities.", 'role': 'assistant'}]