'A + B' means 'A is the sister of B'.
'A - B' means 'A is the brother of B'.
'A × B' means 'A is the father of B'.
'A ÷ B' means 'A is the wife of B'.
If A + B - C ÷ D × E - F, then which of the following statements is NOT correct?
1
C is the mother of F.
2
E is the brother of B.
3
A is the sister of the wife of D.
4
A is the sister of C.