<prompt> Diagnosis of myasthenia gravis is done by usingEdrophoniumNeostigmineSuccinylcholineAtropine  <response>: Ref: KDT 6e p104 Myasthenia gravis can be differentiated from cholinergic crisis with the help ot a sho acting anticholinesterase agent, edrophonium. It improves the symptoms in mvasthenia gravis whereas worsens the condition in cases of cholinergic crisis. Neostigmine is used for the treatmet of myasthenia. 