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
Which has maximum nicotinic effect- 
Select and explain. 
A. Bethanechol, B. Carbachol, C. Pilocarpine, D. Methacholine
B: Carbachol
Answer: B: Carbachol 
Explanation: Ans. is 'b' i.e., Carbachol o Amongst the given options carbachol has maximum nicotinic actions. It has nicotinic as well as muscarinic action.