$\int_0^\pi\left(\sin ^5 x \cos ^3 x+\sin ^4 x \cos ^4 x+\sin ^3 x \cos ^4 x\right) d x=$

• A

  $\frac{873}{2240}$
• B

  $\frac{3 \pi}{128}+\frac{12}{35}$
• C

  $\frac{1641}{4480}$
• Correct answer
  D

  $\frac{3 \pi}{128}+\frac{4}{35}$

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