For a series RLC circuit R = XL = 2XC. The impedance of the circuit and phase difference (between) V and i will be

• A.            \[\frac{\sqrt{5}R}{2},\,{{\tan }^{-1}}(2)\]                     
• B.            \[\frac{\sqrt{5}R}{2},{{\tan }^{-1}}\left( \frac{1}{2} \right)\]
• C.            \[\sqrt{5}{{X}_{C}},{{\tan }^{-1}}(2)\]                           
• D.            \[\sqrt{5}R,\,{{\tan }^{-1}}\left( \frac{1}{2} \right)\]