An aerosol topical dose form should be used when?
a. rubbing is desire
b. the site of application
c. the drug must be inhaled
d. the drug must penetrate the skin

I would say the the correct answer from the choices above is option C. An aerosol topical dose should be used when the drug must be inhaled. This type of dose emit liquid or solid type of drug in a gaseous medium. They are intended for drugs that are to be inhaled. Hope this answers the question. 

Explanation:

i believe its C