1.

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

Answer»

If both ASSERTION and REASON are TRUE annd the reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but the reason is false
if assertion is false but the reason is true

Answer :C


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