
$\mathrm{B}>\mathrm{D}>\mathrm{C}>\mathrm{A}>\mathrm{E}$
Correct $\mathrm{pKa}$ Order :
$\text { B }<\text { D }<\text { C }<\text { A }<\text { E }$
All options are incorrect.
$(1) H_3C - C = C⊝\,(2) H - C = C⊝ \,(3) $ ${H_3}C\,\, - \,\,\mathop C\limits^\Theta {H_2}$

