Đáp án:

 A

Giải thích các bước giải:

Ta có: 

\(\begin{array}{l}
L = \dfrac{{{Z_L}}}{\omega } = \dfrac{{64}}{{2\pi .60}} = \dfrac{8}{{15\pi }}\left( H \right)\\
C = \dfrac{1}{{\omega {Z_C}}} = \dfrac{1}{{2\pi .60.36}} = \dfrac{1}{{4320\pi }}\left( F \right)\\
{Z_L} = {Z_C}\\
 \Rightarrow {\omega _0}L = \dfrac{1}{{{\omega _0}C}}\\
 \Rightarrow {\omega _0} = \dfrac{1}{{\sqrt {LC} }} = \dfrac{1}{{\sqrt {\dfrac{8}{{15\pi }}.\dfrac{1}{{4320\pi }}} }}\\
 \Rightarrow {\omega _0} = 90\pi \left( {rad/s} \right)\\
 \Rightarrow {f_0} = \dfrac{{{\omega _0}}}{{2\pi }} = \dfrac{{90\pi }}{{2\pi }} = 45Hz
\end{array}\)