Answer: Option A, GV law
Explanation: The laws of gravity (Actually called "Newton's law of universal gravitation") are laws in the realm of classical mechanics that tells us the behavior of gravity.
now, the simplifications of it are:
a) GV law
This is fine because with this method you will always remember that these are laws.
b) L of G
This could mean different things, is not advisable to use this type of abbreviations, because you can read it and don't remember what L or G means.
c) VGlity
Do not really understand what this means, this is not a good option.
d) Newt’s grav.
This option is also good because you can remember Newton's name, but it is a little longer than the first option.
So, the option that has the most information and is also shorter is the first option GV law, so that would be the correct option
