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: Pharmacology
[{'content': 'Combined oral pill reduces the risk of ? \nSelect and explain. \nA. Breast cancer, B. Ovarian cancer, C. Cervical cancer, D. Vaginal cancer', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b i.e., Ovarian cancer Functional ovarian cyst o Endometrial carcinoma o Benign breast disease (fibroadenosis) Ovarian malignancy o Urerine fibroid o Premenstural tension & dysmenorrhoea Pelvic inflammatory disease o RA o Osteoporosis Ectopic pregnancy o Colon cancer o Acne", 'role': 'assistant'}]