The parent hydrocarbon contains \(4 C\) atoms and a \(C = C\) double bond.
Hence, it is a butene. Two methyl groups are present as substituents on third \(C\) atom. Prefix \(di\) indicates two methyl groups.
વિધાન $II$: $2$ હાઈડ્રોકસીહેપ્ટેન $-7-$ ઓલ એ ઉપરના સંયોજનનું સાચું નામ છે.
$\,{H_3}C\, - \,\,\mathop C\limits^{\mathop {||}\limits^O } \,\, - \,\,\mathop C\limits^{\mathop |\limits^{OH} } H\,\, - \,\,\mathop C\limits^{\mathop |\limits^{N{O_2}} } H\,\, - \,\,C{O_2}H$