question_answer

Which of the following statements about plastics are true?

(i)  All plastics do not have same arrangement of monomer units.

(ii) Melamine resists fire and can tolerate heat better than other plastics.

(iii) Plastics with cross-linked monomers are also known.

(iv) Plastics have limited applications.

A)  (i) and (iii) only

B)  (iii) and (iv) only

C)  (i), (ii) and (iii) only

D)  (i), (iii) and (iv) only