A simple pendulum performs simple harmonic motion about x - 0with an amplitude a and time period T. The speed of the pendulum at $\mathrm{x}=\frac{\mathrm{a}}{2}$ will be :

• A

  $\frac{\mathrm{\pi a}\sqrt{3}}{\mathrm{T}}$

• B

  $\frac{\mathrm{\pi a}\sqrt{3}}{2\mathrm{T}}$

• C

  $\frac{\mathrm{\pi a}}{\mathrm{T}}$

• D

  $\frac{3{\mathrm{\pi }}^2\mathrm{a}}{\mathrm{T}}$