In a certain code language, 'A ? B' means 'A is the daughter of B' 'A = B' means 'A is the son of B' 'A @ B' means 'A is the father of B' 'A √B' means 'A is the sister of B' Based on the above, how is C related to L if 'C ? D √E = F @ L'?

M is the brother of N, O is the father of M, P is the brother of Q, and Q is the daughter of N. How is M related to Q?

If 'P + Q' means 'P is the father of Q', 'P × Q' means 'P is the brother of Q', and 'P - Q' means 'P is the mother of Q', then which of the following is true about the expression A × B - C + D?