If $f(x)=2^x$, then what is $f^{\prime \prime}(x)$ equal to?

• Correct answer
  A

  $2^x(\ln 2)^2$
• B

  $x(x-1) 2^{x-2}$
• C

  $2^{x+1}(\ln 2)$
• D

  $2^x\left(\log _{10} 2\right)^2$

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