The monomer unit present in the given polymer among the following is-
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Hint: The name of the monomer unit is 2-Methylpropene
The structure of the given polymer is as follows:
The monomer for the above polymer is 2-methylpropene. It is an example of addition polymerization. The reaction is shown below
