The correct order of heat of hydrogenation is/are :

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Heat of hydrogenation relates to stability: less stable compounds have higher heat of hydrogenation. Stability of alkenes increases with more substituted double bonds.

A. $H C \equiv C H > C H_{2} = C H_{2}$ (Triple bond less stable than double bond)

B. $C H_{3} - C H = C H_{2} > C H_{3} - C H = C H - C H_{3}$ (Monosubstituted alkene less stable than disubstituted)

C. $C H_{3} - C H = C H_{2} < C H_{2} = C H - C H O$ (Alkene more stable than $α, β$ -unsaturated carbonyl)

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Options:(select one or more)

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