Which of the following groups contains only easily biodegradable items?
1. Grass, flower and leather
2. Grass, wood and plastic
3. Fruits, peel cake and lime juice
4. Cake, wood and grass.
Which of the above is/are correct?
(a) 1 and 2 (b) 2 and 3 (c) 1, 3 and 4 (d) All of these