Which of the following statements is not correct? $(Ve = 58, \, Lu = 71, \, La = 57, \, Yb = 70)$

• A
  $Ce^{4+}$ has $f^0$ configuration.
• B
  $Lu^{3+}$ has $f^{14}$ configuration.
• C
  $Yb^{3+}$ ion has a pink color.
• D
  $La^{3+}$ is diamagnetic.