Consider the 3-Sided Region Bounded By $x=0$ $y=4$ And $y=\sqrt{x}$ What Is the Exact Volume of the Solid Obtained When

Multiple Choice

Consider the 3-sided region bounded by $x=0$ , $y=4$ and $y=\sqrt{x}$ .What is the exact volume of the solid obtained when this region is rotated around the x-axis?

A) $128 \pi$
B) $8 \pi$
C) $128$
D) $8$