Which of the following graph depicts relation between time period (T) and radius of orbit (r) of a planet ?

Options

A.
B.
C.
D.

Answer

a

Explanation

`T^(2)=((4pi)/(GM))^(4)r^(3)`
`y="m x"`
Graph between `T^(2)` and `r^(3)` is a straight line passing through origin.