Which prefix denotes four carbon atoms?

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Multiple Choice

Which prefix denotes four carbon atoms?

Explanation:
In organic nomenclature, prefixes indicate how many carbon atoms are in the main carbon chain. Four carbons are shown with the prefix but-. It appears in names like butane, butene, and butanol, where the root changes with the functional group or bond type but the four-carbon prefix stays the same. Eth- is two carbons, prop- is three, and pent- is five, so four-carbon compounds use but-.

In organic nomenclature, prefixes indicate how many carbon atoms are in the main carbon chain. Four carbons are shown with the prefix but-. It appears in names like butane, butene, and butanol, where the root changes with the functional group or bond type but the four-carbon prefix stays the same. Eth- is two carbons, prop- is three, and pent- is five, so four-carbon compounds use but-.

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