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  4. Which one of the following is not a vestigial part in human?

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Q. Which one of the following is not a vestigial part in human?

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Solution:

Structures or organs which are present in an organism in a diminished size but no longer useful are called vestigial organ.
About $90$ vestigial organs have been reported from human body. These include coccyx (tail bone), third molar (wisdom teeth) and segmental muscles of abdomen