plica semilunaris in humans is vestigial remenant of.....

Options :
  1. Gill slits
  2. Cecum
  3. Nictitating membrane
  4. Coccyx
Answer and Explanation :-

Answer: Option 3

Explanation:

The plica semilunaris is a small fold of bulbar conjunctiva on the medial canthus of the eye. It is the vestigial remnant of the nictitating membrane (the "third eyelid") which is drawn across the eye for protection. It is present in other animals such as birds, reptiles, and fish. It is rare in mammals, mainly found in monotremes and marsupials.

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There are three deaths. The first is when the body ceases to function. The second is when the body is consigned to the grave. The third is that moment, sometime in the future, when your name is spoken for the last time.
-David Eagleman Sum: Forty Tales from the Afterlives