Identify the correct order of heat of hydrogenation.

Which of the following reactions do not represent the major product of given Birch reductions?

$C_3H_6$ $\xrightarrow{X} Y$ $\xrightarrow[C_6H_6]{AlCl_3} Z \text{ (major product)}$
$X$ and $Z$ respectively in the following reaction sequence are

"$P$" is a hydrocarbon with the molecular formula $C_8H_{14}$. On ozonolysis,"$P$" forms "$Q$". "$Q$" on treatment with alkali under reflux conditions produces "$R$",which on treatment with $I_2/NaOH$ gives a yellow precipitate. Acidification of the solution gives "$S$". The structure of "$S$" is given below:
(Structure $S$: $1-$methyl$-2-$oxocyclopentanecarboxylic acid derivative or similar cyclic structure as per common reaction pathways).
The correct structure of "$P$" is:

Power alcohol is:

The product $(A)$ is