The lymphatic system plays a significant role in maintaining tissue fluid balance. This function helps prevent:

Correct Answer: B

Rationale: Returning fluid prevents edema (swelling) from fluid buildup.

Correct Answer: C

Rationale: B and T lymphocytes drive specific immunity.

Correct Answer: B

Rationale: Retroviruses (e.g., HIV) have RNA as genetic material.

Correct Answer: D

Rationale: B lymphocytes are adaptive, not innate; surfactant , complement , NK cells , and dendritic cells are innate.

Correct Answer: D

Rationale: All (A-C) are true for HIV; thus, D (all of the above) is correct