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Animals like mosquitoes that carry infecting agents from a sick person to another host are:
AEnzymes
BVectors
CToxins
DSpores
Answer & Solution
Correct answer: B. Vectors
1. They are intermediaries.
2. Such animals are vectors.
3. Mosquitoes are the commonest.
_Source: NCERT Class 9 Science, Chapter 13, Why Do We Fall Ill._
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