Which statement concerning homologous series is incorrect?
- AAlkenes have the same general formula, $\mathrm{C}_n\mathrm{H}_{2n+2}$.
- BEach member of the homologous series of alkanes differs from the next by $\mathrm{CH}_2$.
- CThe members of a homologous series all have similar chemical properties.
- DThe members of a homologous series all have the same functional group.