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: Physiology
[{'content': 'Surfactant production in lungs stas at : \nSelect and explain. \nA. 28 weeks, B. 32 weeks, C. 34 wks, D. 36 wks', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. 28 Weeks', 'role': 'assistant'}]