Akathesia is treated by all except -: (A) Trihexyphenidyl, (B) Diazepam, (C) Haloperidol, (D) Promethazine
Answer is C. Drugs used in Akathesia 

β -blockers (propranolol, metoprolol)                  
Antihistaminic (Diphenhydramine, Promethazine)
Vitamin B6
Central anticholinergics (e.g. Trihexyphenidyl)
Diazepam
Amantadine