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: Unknown
[{'content': 'The most common presenting feature of the complete mole is - \nSelect and explain. \nA. Vomiting, B. Amenorrhoea, C. Headache, D. Bleeding pervaginum', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans-D', 'role': 'assistant'}]