This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Physiological Changes of Pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'Surfactant appears in amniotic fluid at the gestational age of: \nSelect and explain. \nA. 28 wks, B. 32 wks, C. 36 wks, D. 38 wks', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Surfactant- production stas at 20 weeks Appears (found significantly) in Amniotic fluid at 24-28 weeks', 'role': 'assistant'}]