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: Social & Preventive Medicine
[{'content': 'The most common side effect of IUD inseion, which requires its removal is - \nSelect and explain. \nA. Bleeding, B. Pain, C. Pelvic infection, D. Ectopic pregnancy', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Pain IUCD o Most common side effect Bleeding o Most common side effect requiring removal of the device Pain", 'role': 'assistant'}]