The velocity $v$ of a particle moving along a straight line when at a distance $x$ from the origin is given by $a+by^{2}=x^{2}$ where $a$ and $b$ are constants. Then the acceleration is

Question

$$\begin{array}{1 1}(1)\frac{b}{x}&(2)\frac{a}{x}\\(3)\frac{x}{b}&(4)\frac{x}{a}\end {array}$$