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
Nicotine receptor sites include all of the following except- 
Select and explain. 
A. Bronchial smooth muscle, B. Adrenal medulla, C. Skeletal muscle, D. Sympathetic ganglia
A: Bronchial smooth muscle
Answer: A: Bronchial smooth muscle 
Explanation: Ans. is 'a' i.e., Bronchial smooth muscle Smooth muscles have muscarinic receptors (M3 type).