Assertion : If the projuct of surface area and density is same for both
Reason : Product of surface area and density is proportional to the mass of the planet per unit radius f the planet.

Options

A. If both Assertin and Reason are correct and Reason is the correct explanation of Assertion
B. If both Assertion and Reason are correct but Reason is not the correct explanation of Assertion
C. If Assertion is true but Reason is false
D. If Assertion is false but Reason is true

Answer

A

Explanation

`v_(e)=sqrt(2gR)=sqrt((2GM)/(R))`
`:. v_(e) prop sqrt((M)/(R))rArr(4pi R^(2)).rho(4pi R^(2))(M)/((4//3)piR^(3))prop(M)/(R)`