The correct option is
C Stability of
I is less than stability of
II.
Both the structures have 5
α-hydrogens.
In case of structure
I :
![](https://search-static.byjusweb.com/question-images/byjus/ckeditor_assets/pictures/1006531/original_1carb.JPG)
Here, after hyperconjugation
2∘ carbanion is formed.
In case of structure
II:
![](https://search-static.byjusweb.com/question-images/byjus/ckeditor_assets/pictures/1006533/original_2carb.JPG)
Here , after hyperconjugation
1∘ carbanion is formed.
Comparing the stability of carbanions, more the number of alkyl groups attached to carbanion, lesser is the stability. This is because alkyl group shows
+I effect and further increases the electron density on carbanion, thus making it unstable.
Since, in case of structure
II, more stable carbanion is formed .
So, Stability of
I is less than stability of
II