This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autacoids, Subject name: Pharmacology
Cholinomimetics are useful in all of the following conditions EXCEPT 
Select and explain. 
A. Glaucoma, B. Mysthenia gravis, C. Post operative atony of bladder, D. Paial hea block
D: Paial hea block
Answer: D: Paial hea block 
Explanation: cholinomimetics use- 1.as miotic- in glaucoma/to reverse the effect of mydriatics after refraction testing/to prevent adhesions between lens and iris or cornea 2.in myasthenia gravis 3.in postoperative paralytic ileus 4.post operative decurarization 5.in cobra bite 6.in belladonna poisoning 8.in Alzheimer's disease REF: ESSENTIALS OF MEDICAL PHARMACOLOGY: KD TRIPATHI:7TH EDITION; PAGE NO 109