With a punch for which the maximum crushing stress is 4 times the maximum shearing stress of the plate, the biggest hole that can be punchedi in the plate would be of diameter equal to

A

$$\frac {1}{4} \times$$ Thickness of plate

B

$$\frac {1}{2} \times$$ Thickness of plate

C

Plate thickness

D

$$2 \times$$ Plate thickness