<prompt> Which of the following is not a carbamate?PhysostigmineNeostigmineEdrophoniumPyridostigmine  <response>: Ans. C EdrophoniumRef: KDT 8the p116, Katzung 11e p104Physostigmine, neostigmine and pyridostigmine are carbamates by chemical nature, whereas edrophonium is an alcohol. 