Four friends, Lisa, Mark, John, and Sarah, are ranked based on their scores: Lisa scored higher than Mark but lower than John. Sarah scored the lowest. Who has the highest score?
In a family of six members A, B, C, D, E, and F, A is the father of B. C is the mother of B. D is the sister of B. E is the brother of B. F is the grandfather of B. Who is the grandmother of B?
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?