Answer:
The group which consist of entirely of organic molecules is:
1. protein, oxygen, fat
Explanation:
Organic molecule is a complex molecule that is primarily made of carbon atoms bonded with other elements and other carbon atoms. All living things on Earth are composed of organic molecules. A molecule is a group of atoms bonded together. The presence of nitrogen, oxygen, and other atoms adds variety to these carbon molecules. Four important classes of organic molecules are carbohydrates, lipids, proteins, and nucleic acids so the correct answer is option 1 which contain a group of proteins, fats and oxygen.
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