Which of the Following Statements Is Correct

question 4

Multiple Choice

Which of the following statements is correct?

• A)In adults the mature T-cell repertoire is self-renewing and long-lived and does not require a thymus for the provision of new T cells.
• B)T cells and B cells are both short-lived cells and require continual replenishment from primary lymphoid organs.
• C)The human thymus is not fully functional until age 30,at which time it begins to shrink and atrophy.
• D)In DiGeorge syndrome the bone marrow takes over the function of the thymus and produces mature peripheral T cells.
• E)None of the above statements is correct.

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