Arrange (I) \[C{{e}^{3+}}\], (II) \[L{{a}^{3+}}\], (III) \[P{{m}^{3+}}\], and (IV) \[Y{{b}^{3+}}\] in increasing order of their ionic radii.

• A. IV<III<I<II
• B. I<IV<III<II
• C. IV<III<II<I
• D. III<II<I<IV