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': 'Combined oral pills protect the woman against all except - \nSelect and explain. \nA. Menorrhagia, B. Benign breast disease, C. Pelvic inflammatory disease, D. Venous thromboembolism', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Venous thromboembolism", 'role': 'assistant'}]