Which anatomical region does the combining form ingui- refer to?

• A. Groin
• B. Fiber
• C. Between
• D. Within

Answer: (A)

The main idea here is matching a combining form to the body region it describes. ingui- comes from the Latin inguen, meaning the groin. In medical terms this root appears in words like inguinal and inguinal region, both referring to the groin area. So the best match for this combining form is the groin. The other ideas don’t relate to a body region named by this root: fiber would link to fibr/o, between to inter- or may be a positional prefix, and within to endo- or intra-, none of which denote the groin.