Ionic radius (in $\mathring{A}$) of $As^{3+}, \; Sb^{3+}$ and $Bi^{3+}$ follow the order :

Question

( A ) $Bi^{3+} > As^{3+} > Sb^{3+}$
( B ) $As^{3+} > Sb^{3+} > Bi^{3+}$
( C ) $Bi^{3+} > Sb^{3+} > As^{3+}$
( D ) $Sb^{3+} > Bi^{3+} > As^{3+}$