Answer:
Option A - 
Step-by-step explanation:
Given : Expression 
To find : Solve the expression ?
Solution :
Step 1 - Write the expression

Step 2 - Multiply the first two bracket in multiplication if base are same power get added and apply symbol rule of multiplication 

Step 3 - Again multiply the bracket,

Therefore, Option A is correct 
we know that
For a spherical planet of radius r, the volume V and the surface area SA is equal to

The
ratio of these two quantities may be written as

we know


therefore
the answer is
