Consider the expansion $\left(x^2+\frac{1}{x}\right)^{15}$. What is the ratio of coefficient of $x^{15}$ to the term independent of $x$ in the given expansion?

• Correct answer
  A

  1
• B

  $\frac{1}{2}$
• C

  $\frac{2}{3}$
• D

  $\frac{3}{4}$

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