Which of these describes the B-cells within the immune system?

A) digestive system

B) Nonspecific receptor cells

C) Thymus maturing cells

D) Memory producing cells

The option D is correct.

B cells are memory producing cells.

Explanation:

As B cells are the specific receptor cell, after immunity to certain infection of the foreign particle, there is a function of acquired immunity is the protection of the body from that particular infection for the whole life which is done by memory cells of B lymphatics.