Which of the following reactions will produce the 2-pentyne in good yield?
`CH_(3)-CH_(2)-C-=C-CH_(3)`
A.
B. `CH_(3)-C-=CN aoverset(CH_(3)CH_(2)Br)to`
C. `CH_(3)-CH_(2)-overset(O)overset(||)(C)-Hunderset(Et_(2)O)overset(CH_(3)CH_(2)MgBr)tooverset(H_(3)O^(+))to`
D. `CH_(3)-CH_(2)-CH_(2)-underset(Br)underset(|)(C)H-CH_(2)-Brunderset("heat")overset(NaOH)to`
