The radius of which of the following orbit is same as that of the first Bohr's orbit of hydrogen atom?

 First Bohr's orbit of hydrogen atom is  0.529 $\times$n² /Z A⁰ =0.529 A⁰

(A) The radius of He⁺ (n = 2) =0.529 $\times$n² /Z  A⁰ =0.529 $\times$ $\frac{2^2}{2}$A⁰ =1.058A⁰

(B)The radius of Li²⁺ (n = 2) =0.529 $\times$n² /Z  A⁰ =0.529 $\times$$\frac{3^2}{2}$A⁰ =0.705 A⁰

(C)The radius of Li²⁺ (n = 3) = 0.529 $\times$n² /Z  A⁰ =0.529 $\times$$\frac{3^2}{3}$A⁰ =1.587 A⁰

(D)The radius of Be³⁺ (n = 2) =0.529 $\times$n² /Z  A⁰ =0.529 $\times$$\frac{2^2}{4}$A⁰ = 0.529 A⁰