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प्रश्न
Which of the following is not a component of immune system?
पर्याय
Lymphocytes
Plasma Proteins
Red Blood Cells
Bone Marrow
MCQ
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उत्तर
Red Blood Cells
Explanation:
Red blood cells (erythrocytes) transport oxygen and do not participate in immune responses, so they are not considered components of the immune system. Lymphocytes are primary immune cells, plasma proteins include immune effectors (e.g., antibodies, complement, interferons), and bone marrow is a primary lymphoid organ where immune cells are formed.
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