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Health and Hygiene — BIOLOGY STD 9 — Question

ICSE BoardEnglish MediumSTD 9BIOLOGYHealth and Hygiene1 Mark
MCQ
A vaccine is
  • A
    An extract of toxins secreted by bacteria
  • B
    A chemical applied on skin to destroy bacteria
  • ✓
    Dead or weakened microbes
  • D
    Strong chemical which destroys microbes on floor, toilet, etc.
✓

Answer

Correct option: C.
Dead or weakened microbes
C

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