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': 'Oestrogen acts as what on bone \nSelect and explain. \nA. Bone matrix deposition, B. Antiresorptive agent on trabecular bone, C. Anti osteoblastic on compact bone, D. Resorptive agent on compact bone', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Oestrogen is anti resorptive agent on trabecular bone.', 'role': 'assistant'}]