Q4. When frog eggs hatch, the babies don't look like the adult frogs. They can only swim in water first. Later, they grow into frogs that can live on land too. Shown here are some stages in the growth of a frog, but they are mixed up.
Which of the following gives the stages of growth in the correct order?
1 Q-->P-->R-->S 3. S-->Q-->P-->R
2 S-->P-->Q -->R 4. Q-->S-->P-->R