How many isomaric dienes with a six-membered ring are possible of the compound with the molecular formula `C_(7)H_(10)` ?

Explanation

Six-membered ring `(6 C "atoms") +1` methyl group
D.U.in `C_(7)H_(10)=((2n_(C)+2)-n_(H))/(2)=((2xx7+2)-10)/(2)=3^(@)`
`1D.U.` for ring `+2D.U.` for two `(C=C)` bonds


In the above examples, cumulative dienes are not possible
, and external cumulative diene (called exocyclic double bond is also not possible beacuse `C-1` has five bonds, i.e., five valencies.

Internal cumulative diene (called endocyclic double bond) is again not possible beacuse arrow-marked `(uparrow)C` atom is `sp-` hybrid. Further, it should be linear but the linearity required for triad is not possible in cyclic or ring compounds.