Which of the following statements are the salient features of hydrostatic extrusion? (1) It is suitable for soft and ductile material (2) It is suitable for high-strength super-alloys (3) The billet is inserted into the extrusion chamber and pressure is applied by a ram to extrude the billet through the die (4) The billet is inserted into the extrusion chamber where it is surrounded by a suitable liquid. The billet is extruded through the die by applying pressure to the liquid. Select the correct answer using the code given below: Codes:

• A. 1 and 3            
• B. 1 and 4
• C. 2 and 3            
• D. 2 and 4