This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General, Subject name: Medicine
Which is the function of below mentioned Tube? 
Select and explain. 
A. Barium enema, B. Soap water enema, C. Nasogastric feeding, D. Gastric lavage
D: Gastric lavage
Answer: D: Gastric lavage 
Explanation: Ans. (d) Gastric lavage.