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
Gas gangrene is caused by -rpt question 
Select and explain. 
A. Clostridium novyi, B. Clostridium septicum, C. Clostridium histolyticum, D. Clostridium perfrigens
D: Clostridium perfrigens
Answer: D: Clostridium perfrigens 
Explanation: Gas gangrene is rapidly spreading, edematous myonecrosis occurring characteristically in association with a severe wound of extensive muscle mass contaminated by pathogenic clostridia. The most frequently encountered is Clostridium perfringens. Reference: Textbook of Microbiology; Anathanarayan and paniker's; 10th edition; Page no: 261