A group of six people: P, Q, R, S, T, and U have the following selection criteria: 1) P and Q must be selected together. 2) R cannot be selected if S is selected. 3) T must be selected if U is selected. Which of the following combinations meets these criteria?
In a group of five books: Book A is thicker than Book B but thinner than Book C. Book D is thicker than Book A but thinner than Book E. Which book is the thinnest?
Four friends, Lisa, Mark, Nina, and Oliver, are ranked based on their scores in a quiz. Lisa scored higher than Mark but lower than Nina. Oliver scored the lowest. What is the correct order of their scores from highest to lowest?