During machining, excess metal is removed in the form of chip as in the case of turning Von a lathe. Which of the following are correct?
Continuous ribbon like chip is formed when turning
1. at a higher cutting speed
2. at a lower cutting speed 3. a brittle material
3. a ductile material
Select the correct answer using the code given below
(a) 1 and 3 (b) 1 and 4
(c) 2 and 3 (d) 2 and 4