This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharmacotherapy In Psychiatry, Subject name: Psychiatry
Drug of choice to treat attention- deficit/hyperactivity disorder? 
Select and explain. 
A. Haloperidol, B. Clonidine, C. Methylphenidate, D. Diazepam
C: Methylphenidate
Answer: C: Methylphenidate 
Explanation: Ans. C. MethylphenidateTreatment: Pharmacotherapy: first line of treatment1. CNS stimulants- DOC, C/I with known cardiac risks & abnormalitiesa. Methylphenidate (Short& sustained release preparations)-dopamine agonist (DOC)S/E- Headache, stomach, Nausea, insomniaRebound effects: mild irritability, Exacerbates ticsPotential growth suppression-drug holidays