Question

Choose the correct statements from the following about the lymphocytes A. The lymphocyte is the basic cell responsible for both humoral and cellular immunity.
B. The lymphocytes which enter or become processed by the thymus are called B cells.
C. Lymphocytes are found in high concentration in the lymph nodes and spleen.
D. They are found in low concentration in the bone marrow and the thymus.
E. The hemopoietic stem cells are the ultimate origin of lymphocytes. Choose the correct answer from the options given below:

• A. A, B, C only
• B. B, C, D only
• C. C, D, E only
• D. A, C, E only

Hint:

T-cells mature in thymus while B-cells mature in bone marrow.

Answer 1

The Correct Option is D

Concept:
Lymphocytes are important cells of immune system.
Step 1:
Lymphocytes participate in:
• Humoral immunity
• Cellular immunity Thus A is correct.
Step 2:
Cells processed in thymus are T-cells, not B-cells. Thus B is incorrect.
Step 3:
Lymphocytes are abundant in spleen and lymph nodes. They originate from hemopoietic stem cells. Thus C and E are correct.
Step 4:
Correct statements are: \[ A,\quad C,\quad E \] \[ \boxed{\text{Correct Option = (4)}} \]