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The correct increasing order of ionic radii of the following Ce3+, La3+, Pm3+ and Yb3+ is
Yb3+ < Pm3+< Ce3+<La3+
Ce3+< Yb3+<Pm3+<La3+
Yb3+< Pm3+< La3+<Ce3+
Pm3+ < La3+< Ce3+ < Yb3+
