Question

Consider the following advantages of shell mould casting             

1. Close dimensional toternace

2. Good surface finish

3. Low cost

4. Easier

Which of these statements are correct?

(a) 1,2 and 3 only           (b) 2,3 and 4 only

(c) 1,2 and 4 only           (d)1,2,3 and 4