Now what ingredients could be used as anti allergens? Now, how would Ira be knowing that? Of course, she didn't know it.. But she did hear what others answered before her. Yeah.. that was true, the anti allergen potion must contain a substance a person is allergic to. She thought about it a little.

So she raised her hand up and answered, "Professor, the anti allergen potion mus contain a substance a person is allergic to, and also the opposite substance which reduces its effect."