This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'All are side effects of OC pills except - \nSelect and explain. \nA. Weight gain, B. Breast discomfo, C. Ovarian malignancy, D. DVT', 'role': 'user'}, {'content': "Answer: C \nExplanation: park's textbook of preventive and social medicine 23rd edition. *cardiovascular effects:myocardial infarction, cerebral thrombosis,and venous thrombosis. *carcinogenesis:increased risk of cervical cancer with increased duration of use. *metabolic effects:elevation of blood pressure, alteration in serum lipid,increased blood glucose level ,breast tenderness,weight gain,head ache and migraine, liver disorder,premature cessation of lactation,ectopic pregnancy, delayed subsequent pregnancy, foetal developmental defect", 'role': 'assistant'}]