(B) Arsenic $(As)$ belongs to group $15$ of the periodic table.Elements in group $15$ have a valence shell electronic configuration of $ns^2 np^3$.The

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(B) Arsenic $(As)$ belongs to group $15$ of the periodic table.Elements in group $15$ have a valence shell electronic configuration of $ns^2 np^3$.They can lose three electrons to show a $+3$ oxidation state or lose all five valence electrons to show a $+5$ oxidation state.Therefore,$As$ exhibits both $+3$ and $+5$ oxidation states.