Let g be the acceleration due to gravity at earth's surface and K be the rotational kinetic energy of the earth. Suppose the earth's radius decreases by 2% keeping all other quantities same, then

Options :

1. g decreases by 2% and K decreases by 4%

2. g decreases by 4% and K increases by 2%

3. g increases by 4% and K decreases by 4%

4. g decreases by 4% and K increase by 4%