Assertion: Shielding effect increases as we go down the group.
Reason: More is the number of electrons in the penultimate shell, more is shielding.
A. If both assertion and reason is the correct explanation of assertion.
B. If both assertion and reason is the correct explanation of assertion.
C. If both assertion and reason is the correct explanation of assertion.
D. If both assertion and reason is the correct explanation of assertion.