Kepler's third law states that square of period of revolution (T) of a planet around the sun, is proportional to third power of average distance r between sun and planet i.e. T = Kr here K is constant. If the masses of sun and planet are M and m respectively then as per Newton's law of gravitation force of attraction between GMm them is F G here G is gravitational constant. The relation between G and K is described as (a) GMK = 4 r (b) K = G (d) GK = 47 (c) K = G