X $ Y means X is the son of Y
X * Y means X is the wife of Y
X @ Y means X is the daughter of Y
Y % X means X is the grand daughter of Y
Which of the following shows that E and K are siblings?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → E $ A $ U * J % K
Read the expression a step at a time. E $ A makes E the son of A; A $ U makes A the son of U; U * J makes U the wife of J, so J and U are the grandparents; and J % K makes K the granddaughter of J.
Since A is the only child of J and U named in the chain, K must be A’s daughter, and E, being A’s son, is her brother — so E and K are siblings. The other three expressions break down: option 2 makes the same person both a wife and a daughter, option 4 makes K the husband of J rather than a sibling, and option 1 reverses the generations.