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: Pharmacology
[{'content': 'Weight gain caused by antipsychotics is due to antagonism of: \nSelect and explain. \nA. 5 HT3, B. 5 HT2A, C. 5 HT2B, D. 5 HT2C', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. (D) 5HT2C (Ref: Goodman Gilman 12/e p435)Antipsychotics cause weight gain due to their antagonistic action on H1 and 5HT2C receptors.', 'role': 'assistant'}]