Smallest snake in the world found in which country ??

This question was asked on Koun Banega Karodpati program. 

Question

Smallest snake in the world is found in which country  ?? 

1.  Antigua and Barbuda 

2.  Bahamas 

3.  Barbados 

4.  Bermuda 

Answer 

By looking at the options, we can conclude that all the places are West Indies islands.

Now which one among these is correct answer ??

As usual I didn't know the answer and asked help of Google !!!

   " Barbados thread snake " is the smallest snake in the world.  It grows upto 10 cm or 4 inches  !!!

As the name itself suggest , it is widely found in

                             BARBADOS            !!!