When $|x| < \frac{1}{2}$ the coefficient of $x^6$ in the expansion of $\left(\frac{2-x}{1+2 x}\right)^2$ is

• A

  $1320$
• Correct answer
  B

  $2640$
• C

  $1088$
• D

  $1980$

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