Assertion (A): Boron has a smaller first ionization enthalpy than beryllium. Reason (R): The penetration of a 2s electron to the nucleus is more than the 2p electron, hence, 2p electron is more shielded by the inner core of electrons that the 2s electrons. (a) Assertion and reason both are correct statements but reason is not correct explanation of assertion. (b) Assertion is correct statement but reason is wrong statement. (c) Assertion and reason both are correct statements and reason is correct explanation of assertion. (d) Assertion and reason both are wrong statement.

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