Which of the following groups contains only biodegradable items? [NCERT](a) Grass, flowers and leather(b) Grass, wood and plastic(c) Fruit-peels, cake and lime-juice(d) Cake, wood and grass

(a), (c) and (d) substances that are broken down (decomposed) by the biological processes are said to be biodegradable e.g. fruit-peels, cake, lime-juice, wood, grass, leather, flowers, etc.