This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Gynaecology & Obstetrics
[{'content': 'Estrogen administration in a menopausal woman increases the: \nSelect and explain. \nA. Gonadotropin secretion, B. LDL cholesterol, C. Bone mass, D. Muscle mass', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Estrogen increases osteoblastic activity. Ref : Dutta book of obstetrics 8th Ed', 'role': 'assistant'}]