Which of the following is a high-efficiency, bacteria-retentive filter used in a laminar flow hood?

Collodions are defined as:

A) Alcoholic solutions containing pyroxylin. B) Liquid solutions that may be either alcoholic or hydro-alcoholic. C) Nonaqueous solutions that contain a medication dissolved in glycerin. D) Aromatic elixirs that mask the unpleasant taste of a medication.

Lozenges and troches prepared from manufactured products have a beyond-use date of 25 percent of time remaining of the products' expiration or __________ months, whichever is earlier

Fill in the blank(s) with correct word