<prompt> Most common organism responsible for gas gangrene is -Clostridium perfringensClostridium difficileClostridium tetaniClostridium septicum  <response>: 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. 