Aşağıdaki bileşiklerden hangisinin IUPAC adı yanlış verilmiştir?
A) $CH_3-CH_2-CH_2-C \equiv CH$: $1$-pentin
B) $CH_3-C \equiv C-CH_3$: $2$-bütin
C) $CH_3-CH(CH_3)-C \equiv CH$: $3$-metil-$1$-bütin
D) $CH_3-C \equiv C-CH_2-CH_3$: $2$-pentin
E) $CH_3-CH_2-C \equiv C-CH_2-CH_3$: $3$-hekzin
