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Which always contains carbon, hydrogen and oxygen?


I. Carbohydrate


II. Protein


III. Fat


A. I and II only


B. I and III only


C. II and III only


D. I, II and III



Sagot :

Answer:

Carbohydrates are organic compounds that contain only carbon, hydrogen, and oxygen. They are the most common of the four major types of organic compounds. There are thousands of different carbohydrates, but they all consist of one or more smaller units called monosaccharides.