Which of the following outer electronic configurations corresponds to the d-block of the periodic table?

If the differentiating electron enter into (n 1) d sub shell then the element is said to be a ‘d-block element’.

$3{\mathrm{s}}^{2}3{\mathrm{p}}^3\to \mathrm{Valence} \mathrm{electron} \mathrm{in} ‘\mathrm{p}’ \mathrm{sub} \mathrm{shell}$

$3{\mathrm{d}}^{5}4{\mathrm{s}}^1\to \mathrm{Valence} \mathrm{electron} \mathrm{in} ‘\mathrm{d}’ \mathrm{sub} \mathrm{shell}.$

$3{\mathrm{s}}^{2}3{\mathrm{p}}^{6}4{\mathrm{s}}^2\to \mathrm{Valence} \mathrm{electron} \mathrm{in} ‘\mathrm{s}’ \mathrm{sub} \mathrm{shell}.$

$5{\mathrm{d}}^{1}6{\mathrm{s}}^2\to \mathrm{Valence} \mathrm{electron} \mathrm{in} ‘\mathrm{d}’ \mathrm{sub} \mathrm{shell}$