Question

The primary lymphoid organ is

• A. Thymus gland
• B. Tonsils
• C. Peyer's patches
• D. Spleen

Hint:

Bone marrow: B-cell and T-cell production. B-cell maturation. Thymus: T-cell maturation.

Answer 1

The Correct Option is A

Step 1: Classification of Lymphoid Organs:
Lymphoid organs are classified into two types:

• Primary Lymphoid Organs: Sites where immature lymphocytes differentiate and mature into antigen-sensitive lymphocytes. Examples: Bone Marrow and Thymus.
• Secondary Lymphoid Organs: Sites where lymphocytes interact with antigens and proliferate. Examples: Spleen, Lymph nodes, Tonsils, Peyer's patches, MALT.

Step 2: Evaluate Options:
Among the given options, the Thymus gland is a primary lymphoid organ. The others are secondary.