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: Microbiology
What is true about H. pylori- 
Select and explain. 
A. Gram -ye Cocci curved, B. Gram +ve Cocci straight, C. Gram +ve bacilli curved, D. Gram -ye spiral bacteria
D: Gram -ye spiral bacteria
Answer: D: Gram -ye spiral bacteria 
Explanation: Ans. is 'd' i.e., Gram -ye spiral bacteria