What is $\int \frac{\ln x}{x} d x$ equal to?

• Correct answer
  A

  $\frac{(\ln x)^2}{2}+c$
• B

  $\frac{(\ln x)}{2}+c$
• C

  $(\ln x)^2+c$
• D

  None of the above where $c$ is the constant of integration.

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