If P + Q means P is the brother of Q; P x Q means P is the father of Q and P - Q means P is the sister of Q, which of the following relations shows that I is the niece of K?

Explanation:-

K + Y → K is the brother of Y
Y x I → Y is the father of I
Hence, → K is the uncle of I
and I - Z → I is the sister of Z
Hence, → I is the niece of K.