Which of the following statements is/ are correct?

I. Gravitational potential due to a mass at a point a distance r away is proportional to r²

II. Gravitational field strength is a vector quantity

III. Gravitational intensity is proportional to the weight of a unit mass.

A. I, II and III
B. III only
C. II only
D. I only

Correct Answer: Option D

D. I only