The following question contains four sentences which in their present arrangement lack coherence, connection and development. There is only one way of rearranging them to make a coherent passage. Choose the correct arrangement from the alternative given and mark your answer as (1), (2), (3) or (4) in the answer sheet.

a. A frog is a small animal that has bulging eyes and long back legs.

b. The strong hind legs enable the frogs to leap further than the length of its body.

c. Frogs are classified as amphibians.

d. Most amphibians spend part of their lives as water animals and part as land animals.