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
Ganglionic transmission is mediated by: 
Select and explain. 
A. Presynaptic alpha-receptors, B. Postsynaptic beta-receptors, C. Postsynaptic dopaminergic receptors, D. Postsynaptic nicotinic receptors
D: Postsynaptic nicotinic receptors
Answer: D: Postsynaptic nicotinic receptors 
Explanation: Ans: D .Postsynaptic nicotinic receptors(Ref: Goodman Gilman 13/e p108, 12Ie p255; Katzung 13Ie p108, 12/e p98).Ganglionic transmission is mediated by nicotinic receptors present post-synaptically.Nicotinic acetylcholine (ACh) receptor mediates neurotransmission post-synaptically at the neuromuscular junction and peripheral autonomic ganglia.In CNS, controls release of neurotransmitters from presynaptic sites.The receptor is called the nicotinic acetylcholine receptor - Due to both alkaloid nicotine & neurotransmitter ACh can stimulate the receptor.