Which root means groin?

• A. thorac/o
• B. inguin/o
• C. sacr/o
• D. lapar/o

Answer: (B)

The root that means groin is inguin/o. In medical terms, the groin area is the inguinal region, and supporting words like inguinal hernia or inguinal canal use this combining form. The other roots refer to different parts: thorac/o means chest or thorax, sacr/o relates to the sacrum, and lapar/o means the abdomen. So inguin/o is specifically the root for groin.