how many sp2 carbon atoms are present in the final product?

Question

<img class="img-fluid question-image" alt="Question" src="https://cdn.tardigrade.in/q/nta/c-4vfduzc75jvnptst.jpg" /> how many sp2 carbon atoms are present in the final product? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

This is an aldol condensation reaction.There are few steps take place in this reaction:
Step 1: Acid base reaction takes place in between base and alpha hydrogen of cyclo pentanone and carbanion is formed.
Step 2: In this step formed carbanion behaves as nucleophile and attacks on carbonyl compound carbon of other cyclo pentanone.
Step 3: Water gives proton and release hydroxide ion as shown below
Solution

Q. how many sp2 carbon atoms are present in the final product?

Q.
how many sp² carbon atoms are present in the final product?