In the scheme given below,the total number of | vedclass

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(A) The starting material is $1,2-dimethylenecyclohexane$ derivative,which upon ozonolysis ($O_3$ followed by $Zn, H_2O$) yields $Y$,which is $cyclode

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(A) The starting material is $1,2-dimethylenecyclohexane$ derivative,which upon ozonolysis ($O_3$ followed by $Zn, H_2O$) yields $Y$,which is $cyclodecane-1,6-dione$.$Y$ $(cyclodecane-1,6-dione)$ has two equivalent carbonyl groups and equivalent $\alpha$-hydrogens.Intramolecular aldol condensation of $cyclodecane-1,6-dione$ involves the formation of an enolate at one of the $\alpha$-positions,followed by nucleophilic attack on the other carbonyl group.Due to the symmetry of the molecule,the attack can occur to form a $5$-membered ring (via a $5$-exo-trig cyclization) or a $7$-membered ring (via a $7$-endo-trig cyclization).According to Baldwin's rules and thermodynamic stability,the formation of the $5$-membered ring is highly favored over the $7$-membered ring.Thus,only $1$ major intramolecular aldol condensation product is formed.

In the scheme given below,the total number of intra molecular aldol condensation products formed from '$Y$' is

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