Question
The trivalent ion having largest size in lanthanide series is
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$A$. have the same energy
$B$. have the minimum overlap
$C$. have same symmetry about the molecular axis
$D$. have different symmetry about the molecular axis
Choose the most appropriate from the options given below:

${(C{H_3} - C{H_2})_2}CuLi\xrightarrow{{C{H_3} - Cl}}\Pr oduct$