Question

Antibodies are synthesized by

• A. T lymphocytes
• B. Macrophages
• C. NK cells
• D. Plasma cells

Hint:

B-cell differentiation: \[ \boxed{ \text{B lymphocyte} \longrightarrow \text{Plasma cell} \longrightarrow \text{Antibody secretion} } \] Memory B cells provide long-term immunity after antigen exposure.

Answer 1

The Correct Option is D

Step 1: Recall the function of plasma cells. Activated B lymphocytes differentiate into plasma cells. These plasma cells synthesize and secrete large quantities of antibodies (immunoglobulins).

Step 2: Identify the correct cell. Therefore, \[ \boxed{\text{Plasma cells}} \] are responsible for antibody production. Hence, \[ \boxed{(D)} \] is the correct answer.