The correct option is B Allergy
Use of antihistamines and steroids give a quick relief from allergies.
People suffering from allergies demonstrate an exaggerated immune response. Immune system cells known as "mast cells" release a substance called histamine, which attaches to receptors in blood vessels, causing them to enlarge.
Histamine also binds to other receptors causing redness, swelling, itching, and changes in secretions. By blocking histamine and keeping it from binding to receptors, antihistamines and steroids prevent these symptoms.