Draw all the structural , stereo, and cyclic isomers of `C_(4) H_(6)`.

Explanation

`D.U.=((2xx4+2)-6)/(2)=2^(@)`
2 D.U. means that it contains`:`
`a.` Two `(C=C)` bonds or
`b.` One `(C=C)` bond or
`c.` One `(C=C)` bond and one cycloalkane or
`d.` Two cyclic rings `(` bicyclo `)`.
On the basis of the above possibilities, the structures of `C_(4)H_(6)` are fomulated as follows`:`
`a.` Two `(C=C)` bonds `:`

`b.` On `(C=C)` bond `:`

`c.` One `(C=C)` bond and one cyclic compount `:`


`d.` Two cyclic rings `(` bicyclo compound `):`