Study the following blood relation information carefully and answer the given questions.
`A Delta B'` means 'A is mother of B'
`A • B'` means 'A is sister of B'. `'A ** B'` means 'A is father of B'.
`'A beta B'` means 'A is brother of B'.
Which of the following means N is uncle of M?

Options

A. `N beta P ^(*) L Delta E ^(*) M`
B. `N ^(*) Y Delta A beta M `
C. `M ^(*) Y ^(**) P ^(*) N`
D. None of these

Answer

A

Explanation

Choice 2 is wrong as here N is followed by * which means N is a female. Choice 3 is wrong as there is no sign after N indicating that sec of N is unknown. In choice I, gap between N and M is `0 + 0 +1 + 0 =1.`
Let us draw its tree :
`{:(N (+) - P (-) - L (-)),(" "|) ,(" "E (-) - M ):}`
Indeed N is uncle of M. (A maternal uncle)