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Question
Assertion :Lymphocytes arise from bone marrow and present in the blood, lymph and serve as natural killer cells. Reason: Lymphocytes migrate to thymus, where they develop into T cells and begin to mature.
Assertion :Lymphocytes arise from bone marrow and present in the blood, lymph and serve as natural killer cells. Reason: Lymphocytes migrate to thymus, where they develop into T cells and begin to mature.
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Solution
The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
A) Assertion is correct as lymphocytes are formed in the bone marrow and are present in the blood and lymph and act as killer cells which destroy dead and infected cells. Reason is correct as some lymphocytes migrate to the thymus where they mature into T lymphocytes. B) Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion as aid in immunity by acting as natural killer cells. C) Reason is correct. D) Both Assertion and Reason are correct. So the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.
A) Assertion is correct as lymphocytes are formed in the bone marrow and are present in the blood and lymph and act as killer cells which destroy dead and infected cells. Reason is correct as some lymphocytes migrate to the thymus where they mature into T lymphocytes.
B) Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion as aid in immunity by acting as natural killer cells.
C) Reason is correct.
D) Both Assertion and Reason are correct.
So the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.
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