11. Clostridium botulinum food poisoning is due to

A. invasion of bacteria in the intestine
B. preformed toxin
C. both (a) and (b)
D. none of the above

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12. Drumstick appearance is characteristic of

A. C tetanomorphum
B. C tetani
C. C sphenoides
D. all of these

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13. Blackening of meat in cooked meat broth is through

A. C histolyticum
B. C perfringens
C. C tetani
D. all of these

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14. Typical drumstick appearance of bacilli is generally seen in

A. C perfringens
B. C botulinum
C. C tetani
D. C histolyticum

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15. Which of the following(s) is/are obligate anaeorbes?

A. C septicum
B. C novyi
C. C tetani
D. All of these

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