"T+ U' means 'T, is the mother of U'
"T - U' means 'T, is the son of U'
"T × U' means 'T, is nephew of U'
"T % U' means 'T, is father of U'
Which of the following means 'A is the nephew of D?'
1
D - B × C - A
2
A - C × B % D
3
B % C × D + A
4
C + D - A % B