This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
Which of the following drugs can cause galactorrhea 
Select and explain. 
A. Bromocriptine, B. Pantoprazole, C. Metoclopramide, D. Omeprazole
C: Metoclopramide
Answer: C: Metoclopramide 
Explanation: Ref: KDT, 6th ed. pg. 643* Galactorrhea is caused by increased level of prolactin.* Normally, this prolactin is in inhibited state by Dopamine.* Prolactin is under predominant inhibitory control of hypothalamus through PRIH (Prolactin Release Inhibitory Hormone), which is Dopamine that acts on pituitary lactotrope D2 receptor.* Dopaminergic agonist like bromocriptine, DA and cabergoline decrease plasma prolactin levels and is used to treat hyperprolactinemia.* Dopaminergic antagonists like chlorpromazine, haloperidol, metoclopramide causes hyperprolactinemia by blocking D2 receptors.