P+Q means P is the brother of Q,
P-Q means P is the mother of Q
P`xx `Q means P is the sister of Q. Which of the following means M is the maternal uncle of R?

Options

A. `M + K + R`
B. `M - R + K `
C. `M + K - R`
D. `M + K xx R`

Answer

C

Explanation

Choice 2 is wrong as here M is a mother and hence of female in choice 1, 3 and 4, the gap between M and R is `0 + 0 = 0,0 + 1 = 1 and 0 + 0 = 0 ` respectively. So, choice 1 and 4 are wrong. Let us try the tree for choice 3. We have
`{:(M (+)- K (-)),(" "|),(" "R):}`Indeed M is material uncle of R here.