This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Pharmacology
Neuroleptics cause hyperprolactinemia by blocing the effect of following on pituitary lactotropes- 
Select and explain. 
A. Dopamine, B. Glycine, C. Acetylcholine, D. Serotonin
A: Dopamine
Answer: A: Dopamine 
Explanation: Ans. is 'a' i.e., Dopamine * Neuroleptics consistently increase prolactin release by blocking the inhibitory action of DA on pituitary lactotropes. This may result in galactorrhoea and gynaecomastia.