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(B) Statement $(i)$: $Eu^{2+}$ $(4f^7)$ and $Yb^{2+}$ $(4f^{14})$ are stable,but they can be oxidized to $Eu^{3+}$ $(4f^6)$ and $Yb^{3+}$ $(4f^{13})$

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$(i)$,$(iii)$

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(B) Statement $(i)$: $Eu^{2+}$ $(4f^7)$ and $Yb^{2+}$ $(4f^{14})$ are stable,but they can be oxidized to $Eu^{3+}$ $(4f^6)$ and $Yb^{3+}$ $(4f^{13})$ respectively. Thus,they act as reducing agents.Statement $(ii)$: The atomic number of $Pr$ is $59$. The electronic configuration of $Pr$ is $[Xe] 4f^3 6s^2$. Therefore,$Pr^{3+}$ is $[Xe] 4f^2$. The statement is incorrect.Statement $(iii)$: $La^{3+}$ has a $4f^0$ configuration. Since there are no unpaired electrons,the aqueous solution of $LaCl_3$ is colourless. The statement is correct.Therefore,statements $(i)$ and $(iii)$ are correct.

Identify the correct statements from the following.
$(i)$ $Eu^{2+}$ and $Yb^{2+}$ are reducing agents.
$(ii)$ The electronic configuration of $Pr^{3+}$ is $[Xe] 4f^3$.
$(iii)$ Aqueous solution of $LaCl_3$ is colourless.

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Identify the correct statements from the following.$(i)$ $Eu^{2+}$ and $Yb^{2+}$ are reducing agents.$(ii)$ The electronic configuration of $Pr^{3+}$ is $[Xe] 4f^3$.$(iii)$ Aqueous solution of $LaCl_3$ is colourless.