Consider the following elements.

Which of the following is/are true about $\mathrm{A}^{\prime}, \mathrm{B}^{\prime}, \mathrm{C}^{\prime}$ and $\mathrm{D}^{\prime}$ ?
A. Order of atomic radii: $\mathrm{B}^{\prime}<\mathrm{A}^{\prime}<\mathrm{D}^{\prime}<\mathrm{C}^{\prime}$
B. Order of metallic character: $\mathrm{B}^{\prime}<\mathrm{A}^{\prime}<\mathrm{D}^{\prime}<\mathrm{C}^{\prime}$
C. Size of the element: $\mathrm{D}^{\prime}<\mathrm{C}^{\prime}<\mathrm{B}^{\prime}<\mathrm{A}^{\prime}$
D. Order of ionic radii : $\mathrm{B}^{\prime+}<\mathrm{A}^{++}<\mathrm{D}^{\prime+}<\mathrm{C}^{\prime+}$
Choose the correct answer from the options given below