1.  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?
A. K + Y + Z - I
B. K + Y x I - Z
C. Z - I x Y + K
D. K x Y + I - Z

Answer: Option B

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.