પદાવલિ $\frac{1+\sin 2 \alpha}{\cos (2 \alpha-2 \pi) \tan \left(\alpha-\frac{3 \pi}{4}\right)} - \frac{1}{4} \sin 2 \alpha \left[\cot \frac{\alpha}{2}+\cot \left(\frac{3 \pi}{2}+\frac{\alpha}{2}\right)\right]$ ની કિંમત શોધો.

• A
  $0$
• B
  $1$
• C
  $\sin ^2 \frac{\alpha}{2}$
• D
  $\sin ^2 \alpha$