processes for thermo – setting materials

Question

Which of the following are the processes for thermo – setting materials

1. Compression                     2. Transfer moulding

3. Injection moulding             4. Extrusion

Select the correct answer using the codes given below

(a) 1 and 4       (b) 1 and 2       (c) 2 and 3       (d) 2, 3 and 4