Cast iron is difficult to weld, because of

Question

Consider the following statements.

Cast iron is difficult to weld, because of

(1) Low ductility               

(2) Poor fusion

(3) Tendency to crack on cooling

Which of these statements are correct?

(a) 1, 2 and 3                  (b) 1 and 2 only

(c) 2 and 3 only              (d) 1 and 3 only