Total number of isomeric xylenes or dichlorobenzenes or cresols is

Step-by-step solution

All the three are disubstituted benzenes, i.e., xylenes has two CH ₃ groups, dichlorobenzenes has two Cl atoms and cresol has one CH ₃ and one OH group. Therefore, each one has three isomers i.e, o-(1,2), m-(1,3) and p-(1,4) .