In a certain code language,

'A ? B' means ‘A is the wife of B’,

'A × B' means ‘A is the brother of B’,

'A : B' means ‘A is the father of B’ and

'A − B' means ‘A is the son of B’.

How is L related to M if 'E − G ? L : K × M’? 

Family Chart:

Decoding the Symbols:

Given: E − G ? L : K × M

Decoding the Relationships:

• E − G means ‘E is the son of G’.
• G ? L means ‘G is the wife of L’.
• L : K means ‘L is the father of K’.
• K × M means ‘K is the brother of M’.

Family Tree:

So, L is the 'Father' of M.

Hence, the correct answer is "Option 4"