The abbreviation “AC” used in prescription means?

Correct option is B

“AC” stands for ante cibum, a Latin term meaning "before meals", used in prescription timing. Explanation of options:
· (a) ✘ “PC” is used for "after meals".
· (b) ✔ “AC” means before meals.
· (c) ✘ “HS” is the abbreviation for "at bedtime".
· (d) ✘ “AC” does not denote evening time.