Answer:
The correct answer is Cromolyn sodium.
Step-by-step explanation:
Allergy is the process which occurs when our immune cell misinterprets a harmless substance as a harmful agent. The symptoms occur when chemicals like histamine are released by mast cell in response to the allergen which causes inflammation, itchiness, redness, pain.
Cromolyn sodium is a drug which is also known as mast cell stabilizer which stops the allergic symptoms by inhibiting the mast cell to release histamine and other chemicals that cause information. Therefore the correct answer is cromolyn sodium.