Q: Fact 1: Lymphocytes are the key cells involved in the immune response. Fact 2: Allergies are an immune system response. Given the two facts above, lymphocytes are a key cell involved in what type of reaction?

Select from the following.
(1). Final Symphonic movement;
(2). illness;
(3). positive;
(4). fever;
(5). allergic;
(6). autologous transplant;
(7). allogenic stem cell transplant;
(8). sweating;
The answer is:
(5).