Which of the following pairs of plastics and their modes of formation are correctly matched?
1.Polyethyene condensation polymerization
2. Polycarbonante.Addition polymerization
3. Polystrene….Addition polymerization
4. Polymide….either by addition or by condensation polymerization
Select the correct answer using the codes given below:
(a) 1 and 2 (b) 2 and 3
(c) 1 and 4 (d) 3 and 4