Five people, W, X, Y, Z, and V, have different ages. W is older than X but younger than Y. Z is older than V but younger than W. Who is the youngest?

B. X

A family consists of four members: X, Y, Z, and W. X is the son of Y. Z is the daughter of W. If Y is married to W, how is Z related to X?

A. COUSIN

A box contains red, blue, and green balls. If there are twice as many red balls as blue balls and three times as many green balls as red balls, which color has the least number of balls?

B. BLUE

In a library, books are categorized into Fiction, Non-Fiction, and Reference. If 'War and Peace' is Fiction, 'A Brief History of Time' is Non-Fiction, and 'Encyclopedia' is Reference, which of the following books belongs to the same category as 'War and Peace'?

C. PRIDE AND PREJUDICE

In a group of six people: A, B, C, D, E, and F, A is older than B but younger than C. D is older than E but younger than F. If C is older than F, who is the youngest?

C. E