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': 'During foetal life maximum growth is caused by : \nSelect and explain. \nA. Growth hormone, B. Insulin, C. Cortisol, D. Thyroxin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Fetal growth is predominantly controlled by :\n\nIGF-1\nInsulin\nOther growth factors', 'role': 'assistant'}]