Most common organism responsible for gas gangrene is -
Clostridium perfringens
Clostridium difficile
Clostridium tetani
Clostridium septicum
Ans. is 'a' i.e., Clostridium perfringens o Most common cause of gas gangrene is Cl perfringens (Cl welchii). Other clostridia causing gas gangrene are Cl septicum, Cl novyi and Cl histolyticum.
Clostridium