Which combining form means nearest point of; closely related; nearest?

• A. Noct/i
• B. Neur/o
• C. Proxim/o
• D. Rhin/o

Answer: (C)

The idea being tested is how a combining form expresses nearness to a reference point. proxim/o denotes near or nearest; it’s the root used to describe closeness in location, such as the proximal part of a limb being closest to the trunk. This aligns with the meaning “nearest point of; closely related; nearest.” For example, proximal means near the point of origin or attachment, and proximity refers to nearness in space or relationship. In contrast, noct/i means night, neur/o means nerve, and rhin/o means nose, so they don’t convey nearness.