Assertion. Lymphocytes arise from the stem cells present in the bone marrow and occur in the blood, lymph and connective tissues.
Reason. Lymphocytes migrate to bursal lymphoid tissue or to thymus and differentiate into B or T-cells.
A. If both A and R are true and R is the correct explantion of A.
B. If both A and R are true but R is not the correct explanation of A.
C. If A is true but R is false
D. If both A and R are false.