This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous system, Subject name: Physiology
Sympathetic postganglionic neurotransmitter in sweat gland 
Select and explain. 
A. Epinephrine, B. Nor- epinephrine, C. Serotonine, D. Acetylcholine
D: Acetylcholine
Answer: D: Acetylcholine 
Explanation: sympathetic postganglionic neurotransmitter in sweat glands is Ach Ref: Ganong's review of medical physiology, 23rd edition Page no:134