This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Neostigmine can reverse the effect of muscle relaxants in all of the below conditions except 
Select and explain. 
A. Blockade by Non Depolarizing muscle relaxants, B. Phase 1 block by Depolarizing muscle relaxants, C. Phase 2 block by Depolarizing muscle relaxants, D. All of the above
B: Phase 1 block by Depolarizing muscle relaxants
Answer: B: Phase 1 block by Depolarizing muscle relaxants 
Explanation: Neostigmine is an anticholinesterase used to reverse effects of muscle relaxants in all of the above conditions except for Phase 1 block by depolarizing muscle relaxants.