$A$ person shows symptoms like sneezing,watery eyes,running nose,and difficulty in breathing upon exposure to certain substances in the air. Which type of antibody is produced during such a condition?

During an allergic reaction,the binding of antigens to $IgE$ antibodies initiates a response,in which chemicals cause the dilation of blood vessels and a host of other physiological changes. Such chemicals are

$A$ person is suffering from frequent episodes of nasal discharge,nasal congestion,reddening of eyes,and watery eyes. These are the symptoms of:

Assertion : Mast cells in the human body release excessive amounts of inflammatory chemicals,which cause allergic reactions.
Reason : Allergens in the environment on reaching human body stimulate mast cells in certain individuals.

In case of severe allergy and cough,the physician advises the patient to get the blood checked. What is expected in the blood smear report?

In allergy and urticaria,the local arterioles dilate due to an increased substance released from mast cells,called: