The earth (mass=6×10²⁴kg) revolves around the sun with an angular velocity of 2×10⁻⁷ radian/sec in a circular orbit of radius 1.5×10⁸km. The force exerted by the sun, on the earth is :-
a. 6×10¹⁹N
b. 36×10²¹N
c. 18×10²⁵N
d. 27×10³⁹N