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Which is not a vestigial part in humans?

1. Segmental muscles of abdomen
2. Finger nails
3. Third molar
4. Coccyx

Correct answer: Finger nails

Solution

Fingernails are not vestigial because they serve important functions such as protecting the fingertips and aiding in grasping. The third molar and coccyx are commonly considered vestigial, and segmental abdominal muscles are not the best fit here compared with fingernails.

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