How many isomers are possible for a disubstituted benzene ? What is the relationship between them ?

Explanation

To determine how many isomers are possible for a disubstituted benzene and to understand their relationships, we can follow these steps:

### Step 1: Understand the structure of disubstituted benzene
Disubstituted benzene refers to a benzene ring that has two substituent groups attached to it. The positions of these substituents on the benzene ring can lead to different isomers.

### Step 2: Identify the possible substitution positions
In a benzene ring, the carbon atoms are numbered as follows:
- C1, C2, C3, C4, C5, C6
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