Read the following Assertion and Reason and choose the correct option. Assertion: Allergic reactions are caused by the release of histamine and serotonin from mast cells. Reason: Mast cells release these chemicals in response to allergens, leading to symptoms such as sneezing and difficulty in breathing.

Step-by-step solution

The exaggerated response of the immune system to certain antigens present in the environment is called allergy. The substances to which such an immune response is produced are called allergens. The antibodies produced to these are of IgE type. Common examples of allergens are mites in dust, pollens, animal dander, etc. Symptoms of allergic reactions include sneezing, watery eyes, running nose and difficulty in breathing. Allergy is due to the release of chemicals like histamine and serotonin from the mast cells. Fo