Four friends, Lisa, Mark, Nina, and Oliver, are compared based on their heights. Lisa is taller than Mark but shorter than Nina. Oliver is shorter than Lisa. Who is the tallest?
In a family, there are four members: P, Q, R, and S. P is the father of Q, Q is the sister of R, and S is the mother of R. Who is the eldest member of the family?
Among four pets, a dog, a cat, a rabbit, and a turtle, the dog is heavier than the cat but lighter than the rabbit. The turtle is the lightest. Which pet is the heaviest?