How to solve pls once show steps..

each gi is elements of order 2 for all I = 1 to n-1 so each element inverse itself . remaining gn is also inverse itself others wise order of G more then n . we know if every non i...

answer is A .....since every element is self inverse remaining only one element so this element must be of order 2(self inverse ) ....and if every element is of order 2 ....or if e...