Statement-I : The configuration of B atom cannot be `1s^(2) 2s^(3)`.
Because
Statement-II : Hund's rule demands that the configuration should display maximum multiplicity.

Options

A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
C. Assertion is true but Reason is false
D. Assertion is false but Reason is true

Answer

B

Explanation

Both assertion and reason are correct. But the correct explanation for assertion is the Pauli's exclusion principle which states that "No two electrons in an atom can have all the four sets of quantum numbers identical" if `2s^3` electronic configuration is existing then two electron will show all the four set of quantum number identical which is impossible and violates Paulis exclusion principle .