Which of the following sets of ions contain only paramagnetic ions

Options

A. `Sm^(3^+),Ho^(3^+),Lu^(3^+)`
B. `La^(3^+),Ce^(3^+),Sm^(3^+)`
C. `La^(3^+),Eu^(3^+),Gd^(3^+)`
D. `Ce^(3^+),Eu^(3^+),Yb^(3^+)`