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 20 years old nulliparous women is on oral contraceptives pills. She is currently diagnosed as having pulmonary tuberculosis. Which anti-tubercular drug decreases the effect of OCP \nSelect and explain. \nA. INH, B. Pyrazinamide, C. Ethambutol, D. Rifampicin', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is d i.e. Rifampicin Interacuons of OCP's with other Drugs", 'role': 'assistant'}]