<prompt> Dr. Sunil used edrophonium for differentiating a myasthenic crisis from the cholinergic crisis. He preferred it over other anticholinesterase agents because of its:Shorter duration of actionLonger duration of actionDirect action on muscle end plateSelective inhibition of true cholinesterase  <response>: Edrophonium- Short-acting anticholinesterase.In Myasthenia gravis, edrophonium improves the condition. 