Assertion (A): Brittle materials such as grey cast iron cannot be extruded by hydrostatic extraction
Reason (R): In hydrostatic extrusion billet is uniformly compressed from all sides by the liquid
a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true but R is NOT the correct
(c) A is true but R is false
(d) A is false but R is true