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': 'Investigation of choice in postcoital bleeding in a 60-year-old lady is: \nSelect and explain. \nA. Pap smear, B. Colposcopy and biopsy, C. Pelvic ultrasound, D. Cone excision of cervix', 'role': 'user'}, {'content': 'Answer: B \nExplanation: An old lady presenting to OPD with post coital bleeding with a leison visible on cervix- raises the suspium carcinoma cervix in this case because CIN is asyntomatic . In such cases pap smear is of no use and directly biopsy should be done. Since lesion is visible we will go for punch biopsy.\nInvestigation Protocol for Diagnosis of Carcinoma Cervix:', 'role': 'assistant'}]