If $\mathrm{y}=(\mathrm{ax}+\mathrm{b}) \cos \mathrm{x}$, then $\mathrm{y}_2+\mathrm{y}_1 \sin 2 \mathrm{x}+\mathrm{y}\left(1+\sin ^2 \mathrm{x}\right)=$

• A

  $y_2 \cos ^2 x$
• Correct answer
  B

  $y_2 \sin ^2 x$
• C

  $y_1 \sin ^2 x$
• D

  $y \sin ^2 x$

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