This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Anticholinergic which is teiary amine is? 
Select and explain. 
A. Valethamate, B. Clidinium, C. Glycopyrolate, D. Hyoscine
A: Valethamate
Answer: A: Valethamate 
Explanation: Ans. is 'a' i.e., Valethamate Anticholinergic drugs Natural alkaloids Atropine, Hyoscine (Scopolamine). Semisvnthetic derivatives Homatropine, Atropine methonitrate, Hyoscine butyl bromide, Ipratropium bromide, Tiotropium bromide. Synthetic compounds a) Mydriatics : Cyclopentolate, Tropicamide. b) Antisecretory-antispasmodics : Quaternary compounds : Propantheline, Oxypheonium, Clidinium, Pipenzolate methyl bromide, Isopropamide. Glycopyrolate. Teiary amines : Dicyclomine, Valethamate, Pirenzepine c) Vasicosective : Oxbutynin, Flavoxate, Toltcrodine. d) Antiparkinsonian : Trihexphenidyl (Benzhexol), Procyclidine. Biperiden.