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': 'Which of the following anti-hypeensives was once used as an antipsychotic ? \nSelect and explain. \nA. Atenolol, B. Propranolol, C. Clonidine, D. Reserpine', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Reserpine o Reserpine was used as an anti-psychotic and anti-hypeensive drug but was withdrawn to risk of suicidal tendencies.", 'role': 'assistant'}]