What is the area of the parabola $y^2=4 b x$ bounded by its latus rectum?

• A

  $\frac{2 b^2}{3}$ square unit
• B

  $\frac{4 b^2}{3}$ square unit
• C

  $b^2$ square unit
• Correct answer
  D

  $\frac{8 b^2}{3}$ square unit

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