Helium has an atomic number of 2 and a mass number of 4

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Helium has an atomic number of 2 and a mass number of 4. This means that a neutral helium atom is made up of? Choose one answer from below:

A)      4 neutrons, 2 protons and 2 electrons

B)     4 neutrons, 4 protons and 2 electrons

C)     2 neutrons, 4 protons and 2 electrons

D)     2 neutrons, 2 protons and 2 electrons