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
Not true about gas gangrene: 
Select and explain. 
A. Most common cause is Cl perfringens, B. Extensive necrosis of muscles, C. Cl perfringens produce heat-labile spores, D. Metronidazole is the drug of choice
D: Metronidazole is the drug of choice
Answer: D: Metronidazole is the drug of choice 
Explanation: Ans. is. 'd' i. e. Metronidazole is the drug of choice