At resonance, the value of current in a series L-C-R- (Symbols have their usual meanings.)

• Correct answer
  A

  $\frac{\mathrm{e}_0}{\mathrm{R}}$
• B

  $\frac{\mathrm{e}_0}{\sqrt{\mathrm{r}^2+\omega^2 \mathrm{C}^2}}$
• C

  $\mathrm{e}_0\left[\mathrm{R}^2+\left(\omega \mathrm{L}+\frac{1}{\omega \mathrm{C}}\right)^2\right]$
• D

  $\frac{\mathrm{e}_0}{\sqrt{\mathrm{R}^2+\omega^2 \mathrm{~L}^2}}$

Hence, the correct answer is option: 'A'.