This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and Reproduction, Subject name: Physiology
Milk ejection reflex is mediated by the hormone: 
Select and explain. 
A. Oxytocin, B. Vasopressin, C. Growth hormone, D. Thyroxin
A: Oxytocin
Answer: A: Oxytocin 
Explanation: A