Explanation:

The gravitational intensity refers to the acceleration due to gravity. The acceleration due to gravity is the acceleration that is gained by a particle due to the gravitational force of the earth. It is symbolized by the variable, g and the standard value of g above the earth’s sea level is given by g=9.8m/s2 in the S.I. unit. In the C.G.S. unit, the units are given by, cm/s2.

• Note: One dyne is the force required to accelerate a mass of one gramme at a rate of 1 cm/s2

Hence option 4th is correct.