Chemistry - Nomenclature Question with Solution | TestHub

Parent chain decane (10 C). Substituents: two methyl groups on ${\mathrm{C}}_2$, ethyl on ${\mathrm{C}}_3$, ethyl on ${\mathrm{C}}_7$, methyl on ${\mathrm{C}}_8$. In the name the substituents are in alphabetical order (ethyl before methyl), the prefix di- or tri- being ignored. The other options use wrong numbering, the wrong alphabetical order or the wrong parent chain.