This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
Drug not acting on neuromuscular junction is: 
Select and explain. 
A. Baclofen, B. carisoprodol, C. Haloperidol, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Essentials of medical pharmacology, seventh edition, page no=357 Answer is option 4,all the above Since carisoprodol, baclofen, and haloperidol are centrally acting muscle relaxants. These are drugs which reduce skeletal muscle tone by a selective action in the cerebrospinal axis without altering consciousness.