a.
![image](https://learnqa.s3.ap-south-1.amazonaws.com/images/16101113854676171941610111385.png)
, (Molecular formula: `C_(5)H_(10)`)
The following are the ring-chain isomers of (I)
1.
Total isomers (excluding stereoisomers)`=5`
b.
![image](https://learnqa.s3.ap-south-1.amazonaws.com/images/16101113866159076401610111386.png)
(Molecular formula: `C_(5)H_(8)`)
The following are the ring-chain isomers of (I)
Total isomers (excluding stereoisomers) `=12`.