The correct option is A Egg ---> Early tadpole ---> Late tadpole ---> Adult frog
The transformation of the larva into an adult through drastic changes is called metamorphosis.
During metamorphosis in the frog, eggs get fertilized to form early tadpoles without legs, later little tiny legs start to grow. At this stage, they are called late tadpoles. Further, the tails get shortened to form the adult frog.