Choose the incorrect statements among the following.
I. The use of histamine, adrenaline and steroids quickly reduces the symptoms of allergy.
II. Active immunity is slow and takes time to give its full effective response.
III. Bone marrow and thymus provide the sites for the interaction of lymphocytes with the antigens.
IV. Autoimmunity is mainly based on memory.

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I, II, III and IV

III and IV

I, III and IV

II, III and IV

answer is C.

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Detailed Solution

I. The use of anti-histamine, adrenaline and steroids quickly reduces the symptoms of allergy.
II. Active immunity is slow and takes time to give its full effective response.
III. Bone marrow and thymus are the primary lymphoid organs (not secondary).
IV. Vaccination is mainly based on memory.

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