The synthesis of 3-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne . The bromoalkane and alkyne respectively are
A. `BrCH_2CH_2CH_2CH_2CH_3` and `CH_3CH_2C-=CH`
B. `BrCH_2CH_2CH_3` and `CH_3CH_2CH_2C-=CH`
C. `BrCH_2CH_2CH_2CH_2CH_3` and `CH_3CH_2C-=CH`
D. `BrCH_2CH_2CH_2CH_3` and `CH_3CH_2C-=CH`