This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET 2019, Subject name: Medicine
Agent used for eliciting diagnostic differentiation of Myasthenia Gravis from Cholinergic crisis is:- 
Select and explain. 
A. Ecothiophate, B. Edrophonium, C. Neostigmine, D. Ambenonium
B: Edrophonium
Answer: B: Edrophonium 
Explanation: myasthenia gravis - we do edrophonium test - we notice improvement because edrophonium inhibits the breakdown of acetylcholine leading to increase in response of muscles