Answer:
(D). Payer's patch: contains B cells that initiate the humoral immune response during infection.
Explanation:
The Payer's patch represents an aggregate group of lymphoid tissues in the lumen of intestine to generate immune responses. It provides protection from invasion of microbes through gut.
There are many plasma B cells are present that produce antibodies during infection and provide humoral immune responses against pathogens.
Thus, the correct answer is option (D).
