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Question

Read the following statements (1 - 2) and select the correct option.

Statement 1: B-cells are capable of binding soluble antigens while T-cells are not.
Statement 2 : The B-cells derived its letter designation from its site of maturation in birds, the bursa of Fabricius.

A
Statement 1 is correct and statement 2 is incorrect
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B
Statement 2 is correct and statement 1 is incorrect
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C
Both the statements 1 and 2 are incorrect
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D
Both the statements 1 and 2 are correct
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Solution

The correct option is D Both the statements 1 and 2 are correct
Lymphocytes are a group of white blood cells in the immune system. Depending on the origin and development of lymphocytes, they are of two types ; T-lymphocytes and B-Lymphocytes.

The B-cells derived its letter designation from its site of maturation that is the bursa of Fabricius in birds. They mature in bone marrow in mammals. T- lymphocytes (T cells) derived its name from the thymus where it matures. Hence statement 2 is correct.

B-cells are associated with antibody-mediated immunity and T-cells are associated with cell-mediated immunity.

B-cells are capable of binding to soluble antigens while T-cells require antigen-presenting cells to display the antigens. Antigen presenting cells will process and present antigens for recognition by T-cells. Hence statement 1 is correct.

Figure : B and T-lymphocytes

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