When the radius and mass of earth are increased by 0.5%. Which of the following statement is correct at the surface of the earth?

As we know that,  g=GMR2,ve=2GMRand                      U=-GMmR∴  g∝MR2,ve∝MR and U∝MRIf both mass and radius are increased by 0.5%, then escape velocity and potential energy remains unchanged, whereas g decreases by 0.5%.Thus, option (a) is correct but rest are incorrect.