The maximum value of reduction in rolling process is
Where ‘D’ is roll diameter and ‘$$\alpha$$’ is the angleof bite

A

$$\frac{D}{2}\left[1 - \frac{\cos \alpha}{2}\right]$$

B

$$\frac{D}{2}\left[1 - \cos \alpha\right]$$

C

$$D \left(1 - \sin \alpha\right)$$

D

$$\frac{D}{2}\left[1 - \sin \alpha\right]$$