Intranasally USED: Select one: a. . ICOS b. Snus; c. Nasvay; d. Snuff;

The correct answer is c. Nasvay.Nasvay is a nasal spray used for the treatment of allergic rhinitis (hay fever) and other nasal allergies. It contains the active ingredient levocetirizine, which is an antihistamine that helps to relieve allergy symptoms such as runny nose, sneezing, and itchy or watery eyes.The other options provided are not used intranasally:a. is not a recognized term related to nasal medications.b. Snus is a type of smokeless tobacco product that is placed under the upper lip, not used intranasally.d. Snuff is a powdered or ground form of tobacco that is inhaled or sniffed, not used as a nasal spray.Therefore, the correct answer is c. Nasvay, which is the nasal spray used intranasally.