Custom means which of the following?

• A. A long-established practice
• B. An accepted behavior
• C. Pertaining to the eye
• D. A medication route

Answer: (A)

Custom means a long-established practice that a group follows over time. It captures traditions handed down and routinely observed because they’ve become the standard way of doing things within a culture or organization. That sense makes it the best fit for the word “custom,” since it emphasizes history and tradition, not just any behavior people happen to display. The other options point to meanings that aren’t about tradition or duration: one describes something related to the eye, and the other refers to a way to give medicine—neither captures the idea of a customary, time-honored practice.