Which of the following sets contain only non-biodegradable materials?
A. Wood, detergent, leather
B. Polythene, detergent, paper
C. DDT, plastic, bakelite
D. Plastic, bakelite, kitchen waste
Answer:C
Which of the following sets contain only non-biodegradable materials?
A. Wood, detergent, leather B. Polythene, detergent, paper C. DDT, plastic, bakelite D. Plastic, bakelite, kitchen waste