The correct trend of acidic nature of the following alkynes is
A. `CH-=CH gt CH_(3) - C-=CH gt CH_(3) C -=C CH_(3)`
B. `CH_(3)-C -=CH gt CH -= CH gt CH_(3) C -= C CH_(3)`
C. `CH_(3)C -= C CH_(3) gt CH_(3 - C-=CH gt CH -= CH`
D. `CH-=CH gt CH_(3)C -= C CH_(3) gt CH_(3) C -=CH`
