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: Gynaecology & Obstetrics
Strongest stimulus of lactation is by : 
Select and explain. 
A. Metoclopramide, B. Post paum hemorrhage, C. Bromocripti ne, D. Suckling
D: Suckling
Answer: D: Suckling 
Explanation: Suckling