This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Pharmacology
Agent required to heal stress ulcers: 
Select and explain. 
A. H2 blockers, B. Proton pump inhibitors, C. Antacids, D. Bismuth
A: H2 blockers
Answer: A: H2 blockers 
Explanation: Ans. A. H2 blockersH2 blockers like ranitidine are the most effective drug in healing stress ulcer. Whereas PPI are most effective in inhibiting the gastric acid secretion.