Proton was discovered by ?
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Rutherford
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Einstein
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Maxwell
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Dalton
A
Correct answer
Explanation
Ernest Rutherford discovered the proton in 1917-1919 through experiments with nitrogen gas, identifying hydrogen nuclei as a fundamental component of all atomic nuclei. This followed his earlier gold foil experiments that revealed the nucleus. Einstein developed relativity theory, Maxwell formulated electromagnetic theory, and Dalton proposed atomic theory (but didn't discover the proton).