Which of the following statements is incorrect?
- A$A$. $A$ cation is smaller than an anion if they are isoelectronic.
- B$B$. Out of $P^{3-}, S^{2-}$ and $Cl^{-}$,$Cl^{-}$ ion is larger in size.
- C$C$. All transition elements are metals.
- D$D$. The ionic radii of lanthanoids in trivalent state decrease with increasing atomic numbers.
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