Dimensional formula of Universal Gravitational constant G is_______.

A)
M-⁻¹L³T⁻²
B)
M⁻¹L²T⁻²
C)
M⁻²L²T⁻²
D)
M⁻²L³T⁻²

Correct Answer :   M⁻¹L²T⁻²