The tail bone of human is an example of a/an ___ structure?

A. Homologous

B. Vestigial

C. Analogous

D. Developmental

The question says, the tail bone of humans is a / an example of ... structure. The correct option is B, that is, vestigial. A vestigial structure is an anatomical structure that serves no physiological function or has a function that has been greatly reduced in the course of evolution. The tail bone of humans has been greatly reduced during the course of evolution.