JEE Main 202116 Mar, Morning shiftChemistryMediumd- and f-Block Elements158× since 2002
Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R :
Assertion A : Size of Bk³⁺ ion is less than Np³⁺ ion.
Reason R : The above is a consequence of the lanthanoid contraction.
In the light of the above statements, choose the correct answer from the options given below :