6. The most toxic exotoxin is
A. tetanus toxin
B. diphtheria toxin
C. botulinum toxin
D. cholera toxin
7. Which of the following species of Clostridium is predominantly saccharolytic?
A. C septicum
B. C perfringens
C. C novyi
D. All of these
8. Stormy clot reaction is useful in the identification of
A. C tetani
B. C botulinum
C. C perfringens
D. C difficile
9. Food poisoning strains of Clostridium perfringens belong to
A. type A
B. type B
C. type C
D. type D
10. Reddening of meat in cooked meat broth is produced by
A. C tetani
B. C histolyticum
C. Clostridium perfringens
D. C sporogenes
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