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The cell-mediated immunity inside the human body is carried out by:

1. B-lymphocytes
2. Thrombocytes
3. Erythrocytes
4. T-lymphocytes

Correct answer: T-lymphocytes

Solution

Cell-mediated immunity is driven by T-lymphocytes, which recognize infected or abnormal cells and coordinate or directly execute immune responses. B-lymphocytes mainly produce antibodies, while thrombocytes and erythrocytes are not immune effector cells.

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