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`alpha`-particle consists of

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`alpha`-particle consists of
A. 2 protons only
B. 2 protons and 2 neutrons only
C. 2 electrons, 2 protons and 2 neutrons
D. 2 electrons and 4 protons only
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Correct Answer - B
`alpha` particle is nucleus of He, so it contains 2 protons and 2 neutrons
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