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: Dental
[{'content': 'The primary lateral incisors begin to calcify about\nthe: \nSelect and explain. \nA. 4th month of life, B. 4th month in utero, C. 41/2 month in utero, D. 5th month in utero', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]