Read the following statements and choose the correct option 1. Allergy is an exaggerated immune response to certain environmental antigens known as allergens. 2.The antibodies involved in allergic reactions are of the IgM type. 3.More and more children in rural cities of India suffer from allergies and asthma due to sensitivity to the environment. 4.Histamine and serotonin released from mast cells are responsible for

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