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Disease-causing microorganisms are called:

APathogens
BAntigens
CVaccines
DEnzymes
Answer & Solution
Correct answer: A. Pathogens
1. They enter through air, water or food. 2. They are pathogens. 3. Diseases they spread are communicable. _Source: syllabus Science, Chapter 2, Microorganisms: Friend and Foe._
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