C4H10 is a saturated hydrocarbon.
A hydrocarbon is an organic compound which consists of carbon (C) and hydrogen (H). For example, C4H10, C2H2 etc. There are four types of hydrocarbons namely alkanes, alkenes, alkynes and aromatic hydrocarbons.
A saturated hydrocarbon is that hydrocarbon in which the carbon atoms are linked only by single bonds. For eg: CH4, C2H6 etc. All alkanes are saturated hydrocarbons.
An unsaturated hydrocarbon is that hydrocarbon in which the carbon atoms are linked through double or triple bonds. For eg: C2H2, C3H4 etc. Alkenes and alkynes are unsaturated hydrocarbons.
C2H2, C3H4 and C4H10 are all unsaturated hydrocarbons. C4H10 is a saturated hydrocarbon as all the carbons are linked through single bonds.
Hence, D is the correct option.
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