This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Schizophrenia Spectrum and Other Psychotic Disorders, Subject name: Psychiatry
Which Atypical agent has low risk of weight gain ? 
Select and explain. 
A. Quetiapine, B. Clozapine, C. Aripiprazole, D. None of above
C: Aripiprazole
Answer: C: Aripiprazole 
Explanation: Clozapine and olanzapine carry high risk ziprasidone and aripiprazole carry a low risk for weight gain and diabetes.