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': 'Insulin is secreted by the fetal pancreas by: \nSelect and explain. \nA. 12th Week, B. 28th Week, C. 32nd Week, D. 38th Weeks', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]