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': 'A 55-years-old lady presenting to out patient department (OPD) with postcoital bleeding for 3 months has a 1 x 1 cm nodule on the anterior lip of cervix. The most appropriate investigation to be done subsequently is: \nSelect and explain. \nA. Pap smear, B. Punch biopsy, C. Endocervical curettage, D. Colposcopy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]