The correct order of the first ionization enthalpy is - Vidyadip

Question

The correct order of the first ionization enthalpy is

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Answer

d
($i$) due to lanthanide contraction $\mathrm{T} \ell$ has more $I.E$. as compared to $\mathrm{Ga}$ and $\mathrm{A} \ell$

($ii$) due to scandide contraction Ga has more $I.E$. as compared to $\mathrm{A} \ell$

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