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
Acetylcholine acting on nicotinic receptors produces 
Select and explain. 
A. Contraction of skeletal muscle, B. Secretion saliva, C. Bradycardia, D. Pupillary constriction
A: Contraction of skeletal muscle
Answer: A: Contraction of skeletal muscle 
Explanation: Acetylcholine acting at motor and causes muscle contraction Ref: guyton and hall textbook of medical physiology 12 edition page number:76,77,78