Identifying immune cell roles in viral response

Steps:

• Recall viral infection activates T-helper cells to stimulate B cells.
• B cells differentiate into plasma cells for antibody production and B-memory cells for immunity.
• T-memory cells provide long-term T-cell response, while T-killer cells target infected cells.
• Match labels: E as B-memory (long-term B immunity), F as T-helper (activation), H as plasma cell (antibody secretion).

Why A is correct:

• Option A aligns with standard humoral immunity: T-helper cells activate B cells to form plasma cells (antibody producers) and B-memory cells (per definition in adaptive immunity).

Why the others are wrong:

• B: Confuses T-helper with T-memory; T-memory forms after activation, not as primary activator.
• C: T-plasma cells do not exist; plasma cells are B-cell derived only.
• D: T-killer cells destroy infected cells but do not directly label as F (T-helper role).

Final answer: A