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AIDS is caused by which infectious agent that attacks the body's lymphocytes?
ABacterium Bacillus thuringiensis
BHuman Immunodeficiency Virus (HIV)
CStreptococci bacteria
DAn oncogenic fungus
Answer & Solution
Correct answer: B. Human Immunodeficiency Virus (HIV)
1. AIDS is a severe viral disease in which the immune system fails.
2. It is caused by the Human Immunodeficiency Virus (HIV), which attacks lymphocytes.
3. The bacterial and fungal options are not the cause, so A, C and D are traps.
4. Hence the answer is B.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit "Health and Diseases", p.317_
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