Which one among the following statements is not correct ?

Newton's law of gravitation does NOT follow from Newton's laws of motion — it is an independent fundamental law that Newton formulated separately based on observation of celestial bodies. The other statements are correct: gravitational force is universal and acts between all masses; the value of g at the centre of the Earth is zero because mass is distributed symmetrically around that point, resulting in equal gravitational pulls from all directions; and mass is measured in kilograms while weight is measured in newtons, so they have different units.