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': 'Physiological changes of pregnancy include :\na. Insulin levels increase\nb. Increased BMR\nc. Hypothyroidism\nd. GH decreases\ne. Blood volume decreases \nSelect and explain. \nA. ab, B. ac, C. bc, D. db', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hormones during pregnancy', 'role': 'assistant'}]