Assertion: Helium and beryllium have similar outer electronic configuration of the type `ns^(2)`.
Reason: Both are chemically inert.

Options

A. If both Assertion (A) and (R ) are correct and Reason (R ) is the correct explanation of Assertion (A).
B. If both (A) and (R ) are correct but (R ) is not the correct explanation for (A).
C. If (A) is correct but (R ) is not correct.
D. If (A) and (R ) are correct

Answer

C

Explanation

Correct reasong: Although `He` and `Be` have similar outer electronic configuration `(ns^(2))`, only `He(1s^(2))` has inert gas configuration and hence is chemically inert.
But `Be(2s^(2))` does not have inert gas configuration and hence is not chemically inert