Question Detail
Question
Which is not a vestigial organ in man? a. segmental muscles of abdomen b. coccyx c. third molar d. nails
Correct Answer
Option D is the correct answer.
Detailed Explanation
Nails are functional structures that protect the fingertips and aid in manipulation. Segmental abdominal muscles (remnants of muscle blocks), the coccyx (tailbone), and third molars (wisdom teeth) are all considered vestigial structures in humans.
Hint
Which one of these still has a clear, useful function?