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In the first question, we are assigned to the task to identify the lipid that refers to polycyclic hydrocarbon.
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Lipids are the molecules that are not soluble in water but soluble in organic solvent.
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There are five classes of lipids, that is, free fatty acids, triacil, glycerol, phospholipids, glycopolipids, and steroids.
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Among these, steroids are polycyclic hydrocarbon with, variety of functions.
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The example is cholesterol.
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Therefore, we can say that the polycyclic hydrocarbon which contains carbon and hydrogen composed of multiple cyclic is stearous, which suggested the correct option is option e...