The area (in sq. units) of the region given by $R=\left\{(x, y): \frac{y^2}{2} \leq x \leq y+4\right\}$ is

• A

  $16$
• Correct answer
  B

  $18$
• C

  $24$
• D

  $30$

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