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Consider the following properties for plastics:                     

1. Become hard on heating

2. Increasing plasticity

3.Ability to deform with rise in temperature

4. Long chain structure

Which of these properties for plastics are correct?

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

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

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