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: Anatomy
[{'content': 'Hea is fully developed at which age of intrauterine life ? \nSelect and explain. \nA. 3rd month, B. 4th month, C. 5" month, D. 6" month', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 3rd month", 'role': 'assistant'}]