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Cell-mediated immunity is carried out primarily by
AT-lymphocytes
BB-lymphocytes
Cmacrophages only
Dplatelets
Answer & Solution
Correct answer: A. T-lymphocytes
1. T-lymphocytes (T cells) attack infected cells directly without producing antibodies.
2. Cytotoxic T cells (CD8) destroy virus-infected and tumour cells; helper T cells (CD4) regulate the response.
3. B-cells handle humoral (antibody-mediated) immunity instead.
_Source: Maharashtra Balbharati Std XII Biology, Ch 9 "Human Health and Diseases" §9.4_
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