This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
Cholinomimetic drugs can be used for the treatment of all the following conditions EXCEPT 
Select and explain. 
A. Closed angle Glaucoma, B. Bradycardia, C. Cobra bite, D. Myasthenia gravis
B: Bradycardia
Answer: B: Bradycardia 
Explanation: Ref: 7th edition KD Tripathi (page no:103) ACh hyperpolarizes SA nodal cells, as a results bradycardia occur.so cholinomimetics can't be used for bradycardia. Anticholinergics like atropine should be used for bradycardia Cardiac muscuranic receptor is M2 subtype