Which two of the following are typically necessary to stimulate B-Lymphocyte to divide and differentiate?

Correct Answer: B

Rationale: B-lymphocytes require a helper T-lymphocyte and an antigen for activation and differentiation.

Correct Answer: C

Rationale: Macrophages and neutrophils are professional phagocytes ; T cells , B cells , and NK cells are not.

Correct Answer: B

Rationale: Gamma-delta (YD) T cells are abundant in mucosal sites like intestine, uterus, and tongue .

Correct Answer: D

Rationale: The thymus eliminates self-reactive T cells via selection ; Treg generation is secondary, not B cells or activation .

Correct Answer: C

Rationale: The thoracic duct drains all but the right arm/upper right quadrant , which the right lymphatic duct handles.