question_answer

         Consider the following pairs of plastics and their distinct characteristics:                    

1. Acrylics very good transparency to light

2. Polycarbonate poor impact resistance.

3. PTEF low coefficient of friction.

4. Polypropylene excellent fatigue strength-

Which of these statements are correct?     

A) 2 and 3            

B) 1 and 3     

C) 1 and 4            

D) 2 and 4.