Tuberculosis (TB) is caused by:
A{'text': 'Mycobacterium'}
B{'text': 'A virus'}
C{'text': 'A fungus'}
D{'text': 'A protozoan'}
Answer & Solution
Correct answer: A. {'text': 'Mycobacterium'}
1. Tuberculosis is a chronic disease that mostly affects the lungs.
2. It is caused by the bacterium **Mycobacterium tuberculosis**.
3. Viruses cause AIDS, dengue and rabies; fungi cause ringworm; protozoans cause malaria and amoebiasis.
4. So the correct causative agent of TB is the bacterium **Mycobacterium**.
_Source: Selina Concise ICSE Class 8 Biology Ch 8 "Diseases and First Aid", Pathogens table_
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