This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
The most common organism causing food poisoning in canned food is 
Select and explain. 
A. S typhi, B. V cholarae, C. H pylori, D. C botulinum
D: C botulinum
Answer: D: C botulinum 
Explanation: Clostridium botulinum: strict anaerobic, cause botulism. Source of foodborne botulism is preserved food, meat and meat products, canned foods. Proteolytic varieties can digest food, which appears spoiled. The cans are often inflated and show bubbles on opening. Non-proteolytic varieties have food unchanged. Reference: Textbook of Microbiology; Anathanarayan and paniker's; 10th edition; Page no: 269