When the city and state are used in a sentence, a comma is placed after the state

The two most common injuries associated with unintentional laser exposure are ____________________________________

A. eye injury and tissue burn C. infection and allergies B. infertility and genetic mutation D. infection and wound dehiscence

What is the dosage for ipratropium bromide (Atrovent)?

a. 2 puffs four times daily b. 2 puffs three times daily c. 2 puffs twice daily d. 2 puffs every 12 hr