Which of the following groups contain on...

Which of the following groups contain only biodegradable items ?

Grass, filowers, and leather

Grass, wood, and plastlc

Frult-peels, cake, and lime juice

Cake, wood, and grass

Verified by Experts

(a) Grass, flowers, and leather
(c ) Fruit-peels, cake, and lime juice
(d) Cake, wo0d, and grass

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Which of the following is a group ?

{1,2,4,8} under multiplication

`{0,pm2,pm4,pm6, . . .}` under addition

`{1,-1}` under addition

{0,1,2,3,4} under multiplication module 5

insulin

adrenaline

thyroxine

testosterone

Vitamin C

Haemonglobin

Chlorophyll

Vitamin `B_(12)`.