This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'Drugs associated with ischemic stroke include the following except \nSelect and explain. \nA. Cocaine, B. Oral contraceptives, C. Amphetamines, D. Barbiturates', 'role': 'user'}, {'content': 'Answer: D \nExplanation: *misuse of oestrogen containing drugs like oral contraceptive pills ,hormone replacement therapy,cocaine ,amphetamine,alcohol are modifiable risk factors of ischemic stroke . Ref Harrison20th edition pg 2445', 'role': 'assistant'}]