What is $\int \frac{\sin \sqrt{x}}{\sqrt{x}} d x$ equal to? where $c$ is a constant of integration.

• A

  $\frac{\cos \sqrt{x}}{2}+c$
• B

  $2 \cos \sqrt{x}+c$
• C

  $\frac{-\cos \sqrt{x}}{2}+c$
• Correct answer
  D

  $-2 \cos \sqrt{x}+c$

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