(i) Wood, paper, leather

(ii) Polythene, detergent, PVC

(iii) Plastic, detergent, grass

(iv) Plastic, bakelite, DDT

(a) (iii)

(b) (iv)

(c) (i) and (iii)

(d) (ii) and (iv)

Correct option – ( d )

Explanation for correct option – polythene , detergent , PVC , plastic , bakelite and DDT are all non biodegradable items  

Explanation for incorrect option – in rest of the options wood , paper and grass all three items are degradable .

Hence correct option is Polythene, detergent, PVC and Plastic, bakelite, DDT