Which of the following statements regarding alkenes and alkynes is NOT correct?
A) Alkenes and alkynes are typically present in large amounts in crude oil.
B) Alkenes are commonly derived from plant sources.
C) Alkynes are not common in nature due to the reactivity of the C 
C bond.
D) Alkanes can be dehydrogenated to give alkenes and alkynes.
E) Hydrocarbon reactivity increases in the order alkanes < alkenes < alkynes.
Correct Answer:
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