MHT CET Chemistry question

Arrange Ce, La, Pm and Yb in increasing order of their ionic radii.

• (A)\mathrm{Yb^{3+} < Pm^{3+} < Ce^{3+} < La^{3+}}Correct
• (B)\mathrm{Ce^{3+} < Yb^{3+} < Pm^{3+} < La^{3+}}
• (C)\mathrm{Yb^{3+} < Pm^{3+} < La^{3+} < Ce^{3+}}
• (D)\mathrm{Pm^{3+} < La^{3+} < Ce^{3+} < Yb^{3+}}