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
Anticholinergic drug used in parkinsonism - 
Select and explain. 
A. Benzhexol, B. Beneserazide, C. Pirenzepine, D. Atropine
A: Benzhexol
Answer: A: Benzhexol 
Explanation: Ans. is 'a' i.e., Benzhexol Drugs for parkinsonasm|||Increasing brain dopaminergic activityDecreasing brain cholinergic activityo Dopamine precursor - Levodopao Periphera decarboxylase inhibitors - Carbidopa, Benserazideo Dopaminergic agonists - Bromocriptine, Ropinirole. Pramipexal, Ritigotineo MAO-B inhibitor - Selegilineo COMT inhibitor - Entacapone, Tolcaponeo Dopamine facilitator - Amantidineo Central anticholinergic - Trihexyphenidyl (Benzhexol), Procyclidine, Biperiden.o Antihistaminic - Orphenadrine, promethazine.