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Select the Most Appropriate Option in Each Case. - Biology

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Question

Select the most appropriate option in each case.

Vaccines are

Options

  • An extract of toxins secreted by bacteria

  • An extract of dead and weakened microbes

  • Strong chemicals obtained from fungi

  • Chemicals that are applied on the skin to kill bacteria

MCQ

Solution

Chemicals that are applied on the skin to kill bacteria

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Chapter 17: Aids to Health - Multiple choice type [Page 174]

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Selina Concise Biology [English] Class 9 ICSE
Chapter 17 Aids to Health
Multiple choice type | Q 5 | Page 174
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