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.
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