Which of the following quantities is dimension less?

Gravitational Constant Planck's Constant Power of lens None of these

None of these

The power of lens is dimensionally represented as $[M^0 L^{-1} T^0].$ The dimensional formula of Planck's constant h is$ [ML^2T^{-1}].$ The gravitational constant is dimensionally represented as $[M^{-1} L^3 T^{-2}].$