This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
Patient having gastroenteritis after eating contaminated food.microscopy showed gram-positive bacillus with subterminal spore. The bacteria is 
Select and explain. 
A. Clostridium per fringes, B. Staphylococcus, C. Clostridium tetani, D. Corynebacterium
A: Clostridium per fringes
Answer: A: Clostridium per fringes 
Explanation: Clostridium-gram positive bacillus Food poisoning -clostridium perfringes Ref: Textbook of Microbiology Baveja 4th ed Pg 591