In non-uniform circular motion,the ratio of tangential to radial acceleration is ($r$ is the radius of the circle,$v$ is the speed of the particle,$\alpha$ is the angular acceleration).

• A
  $\frac{\alpha r^2}{v^2}$
• B
  $\frac{\alpha^2 r}{v^2}$
• C
  $\frac{\alpha^2 r^2}{v}$
• D
  $\frac{v^2}{r^2 \alpha}$