The relation between time $t$ and distance $\mathrm{x}$ is $\mathrm{t}=a \mathrm{x}^2+\mathrm{bx}$ where $\mathrm{a}$ and $\mathrm{b}$ are constants. The acceleration is

• A

  $-2 a b v^2$
• B

  $2 b v^3$
• Correct answer
  C

  $-2 a v^3$
• D

  $2 a v^2$

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