Assertion :The mass of electrons is least among all the fundamental particles. Reason: The charge of an electron is $- 1.602 \times 10^{- 19} C$ .

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Assertion is incorrect but Reason is correct.

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
The mass of electrons is least among all the fundamental particles.Due to its very low mass.
The charge of an electron is $- 1.602 \times 10^{- 19} C$ .
But there is no relation between the charge and mass of the electron.

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