Question

which of the following routes of administration abbreviations stands for both eyes?
ou
os
ad
au

Explanation:

In medical - health abbreviations, "OU" stands for oculus uterque which means both eyes. "OS" stands for oculus sinister (left eye), "AD" is often used for right ear in some contexts (not related to eyes here), and "AU" usually stands for auris uterque (both ears).

Answer:

A. OU