GENERAL ORGANIC CHEMISTRY
231810
The correct IUPAC name of the hydrocarbon ' $\mathrm{X}$ ' is
1 2-methyl-3-ethylpentane
2 3-ethyl-2-methylpentane
3 3-isopropyl pentane
4 1, 1-diethyl-2-methylpropane
Explanation:
The structure of hydrocarbon is given as-

The IUPAC name of the given compound will be 3ethyl-2-methylpentane.