Which of the following lanthanoids shows $+4$ oxidation state to acquire noble gas configuration?
(At nos. : $La=57, Ce=58, Eu=63$ and $Yb=70$ )
(At nos. : $La=57, Ce=58, Eu=63$ and $Yb=70$ )
- A$Ce$
- B$Yb$
- C$La$
- D$Eu$
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