$$ \lim _{n \rightarrow \infty} \sum_{n=5}^{5 n+5} \frac{n^2}{2^{\frac{3}{2}}}= $$

• A

  $\frac{1}{\sqrt{2}}$
• B

  $\frac{1}{3} \log 2$
• C

  $\frac{\pi}{4}$
• Correct answer
  D

  $\frac{5}{\sqrt{26}}$

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