In Carbohydrates the ratio of hydrogen to oxygen is

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None of the above

The correct answer is $\boxed{\text{A. 2:1}}$.

Carbohydrates are made up of carbon, hydrogen, and oxygen atoms. The ratio of hydrogen to oxygen atoms in carbohydrates is always 2:1. This is

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because carbohydrates are composed of carbon, hydrogen, and oxygen atoms in the ratio $C_xH_2O_y$, where $x$ and $y$ are integers. For example, glucose is a carbohydrate with the chemical formula $C_6H_{12}O_6$. This means that glucose is composed of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. The ratio of hydrogen to oxygen atoms in glucose is therefore 12:6 = 2:1.

Option B is incorrect because the ratio of hydrogen to oxygen atoms in carbohydrates is not 1:3. Option C is incorrect because the ratio of hydrogen to oxygen atoms in carbohydrates is not 2:4. Option D is incorrect because the ratio of hydrogen to oxygen atoms in carbohydrates is always 2:1.

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