In a certain code language,
A : B means ‘A is the father of B’
A + B means ‘ A is the wife of B’
A < B means ‘A is the sister of B’
A > B means ‘A is the son of B’
Based on the above, how is F related to K if 'F + R > A : N < K’?
ABrother's wife
BBrother's sister
Crother's brother
DBrother's mother