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: Gynaecology & Obstetrics
[{'content': "Fetal pulmonary maturity can be evaluated by phospholipids' activity in amniotic fluid. In which of the following pregnancies does the fetus have the least chance of developing respiratory distress syndrome (RDS)? \nSelect and explain. \nA. Normal pregnancy: amniotic fluid L/S is 1.8:1, phosphatidyl glycerol (PG) is absent, B. Diabetic pregnancy: amniotic fluid L/S is 2:1, PG is absent, C. Diabetic pregnancy: amniotic fluid L/S is 2:1, PG is present., D. All of the above", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]