Q. Which one of the following is an example of vestigial organ in man?

Explanation by: Mr. Dubey

Vestigial organs are body parts that have lost most or all of their original function through evolution. In humans, such structures may no longer serve a significant purpose.
(A) Jaw apparatus – Not vestigial. It plays a crucial role in chewing and speaking.
(B) Ear muscles – Correct. These are vestigial in humans; they were once used by ancestors to move their ears for better hearing, but now most people can't move their ears voluntarily.
(C) Canine teeth – Not vestigial. They still help in tearing food.
(D) Humerus – Not vestigial. It is a major bone in the arm, essential for arm movement.