Question: Which Clostridium genus is a producer of enterotoxin A and cytotoxin B responsible for diarrhea (pseudomembranous colitis) associated with treatment with antimicrobials ?: 
 Options:  <1> Clostridium perfringens. <2> Clostridium difficile. <3> Clostridium botulinum. <4> Clostridium novyi. <5> Clostridium histolyticum.
2