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: Surgery
A pt. of peptic ulcer disease. When investigated endoscopically showed chronic antral gastritis. Which of the following dye will be able to stain the specimen 
Select and explain. 
A. PAS, B. Zeil-Neilson stain, C. Gram stain, D. Warthin-Starry stain
D: Warthin-Starry stain
Answer: D: Warthin-Starry stain 
Explanation: None