To clear the fractions in the equation \( y = \frac{2}{3}x + \frac{1}{4} \), we need to multiply through by the least common multiple (LCM) of the denominators.
The denominators in the equation are 3 and 4. The least common multiple of 3 and 4 is 12.
So, Rahul should multiply the entire equation by 12.
Therefore, the correct response is:
12