Chemistry - Nomenclature Question with Solution | TestHub

Parent chain decane (10 C). Two identical complex substituents, 1,1-dimethylpropyl, on ${\mathrm{C}}_5$ and one methyl on ${\mathrm{C}}_2$. 'bis' is ignored in alphabetising; the complex name is alphabetised under 'd' of dimethylpropyl, which comes before methyl. The other options use wrong numbering, the wrong alphabetical order or the wrong parent chain.