Chemistry - GOC Question with Solution | TestHub

⇒ No resonance and less no. of $\alpha \mathrm{H}$ \ $\mathrm{HOH}$ is maximum due to most unstable alkene.

⇒ More no. of aH 2 resonance \ $\mathrm{HOH}$ less order ($\mathrm{C}$ < $\mathrm{D}$ < $\mathrm{B}$ < A)