Assertion: `F` atom has a less negative electron affinity than `CI` atom.
Reason: Additional electrons are repelled more effectival by `3p` electrons in `CI` atom than by `2p` electrons in `F` atom.
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 correct explanation of Assertion.
C. Assertion is true but Reason is false.
D. Assertion is false but Reason is true.