1.
The planet A is Neptune, B is Earth and C is mercury.
2.
Among them Planet A is the farthest from the sun because its temperature is minimum among them.
3.
In planet B there is possibility of life because:
- There is suitable atmosphere for living organism.
- There is presence of water in its surface.
- Its surface temperature is only 15°c which is suitable.
4.
Planet C is Mercury. Here, one part of it is directed towards sunlight for long period and has the temperature up to about 420°c. The remaining part is extremely cold and its temperature reaches to -180°c. Hence, There is vast difference in temperature in planet C.