The correct answer is A. 1840.
A proton is a subatomic particle with a positive elementary electric charge. It is one of the two constituents of the atomic nucleus along with neutrons, and together they make up the protons and neutrons of an atomic nucleus. Protons and neutrons are called baryons.
An electron is a subatomic particle with a negative elementary electric charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure. The electron has a mass that is approximately 1/1836 that of the proton.
The ratio of the mass of a proton to that of an electron is approximately 1840. This means that a proton is 1840 times more massive than an electron.
Option B is incorrect because the ratio of the mass of a proton to that of an electron is not 1480.
Option C is incorrect because the ratio of the mass of a proton to that of an electron is not 30.
Option D is incorrect because the ratio of the mass of a proton to that of an electron is not 4.