In a certain code language, 'A + B’ means ‘A is the daughter of B’,

‘A – B’ means ‘A is the brother of B’,

‘A $$\times$$​ B’ means ‘A is the wife of B’ and

‘A ÷ B’ means ‘A is the father of B’.

How is W related to Y if  ‘W + E $$\times$$​ R – T ÷ Y’?

A + B → A is the daughter of B.

​‘W + E ×​ R – T ÷ Y’?

According  to the given code, Family Tree of the given expression will be:

As per family tree, W is the daughter of Y’s father’s brother, which makes her Father's Brother's Daughter.
Thus, the correct answer is (a) Father's Brother's Daughter.