The structure of the monomer used for the preparation of plexiglass is

Options

A. `CH_(2)=overset(CN)overset(|)C-COOC_(2)H_(5)`
B. `CH_(2)=overset(CH_(3))overset(|)C-COOC_(2)H_(5)`
C. `CH_(3)-CH=CH-overset(CH_(3))overset(|)(CH)-COOCH_(3)`
D. `CH_(2)=overset(CH_(3))overset(|)C-COOCH_(3)`

Explanation

To determine the structure of the monomer used for the preparation of plexiglass, we need to identify the correct monomer that leads to the formation of polymethyl methacrylate (PMMA), commonly known as plexiglass.

### Step-by-Step Solution:

1. **Understand the Polymer**: Plexiglass is the common name for polymethyl methacrylate (PMMA). This means that the polymer is derived from the monomer methyl methacrylate.

2. **Identify the Monomer**: The name "methyl methacrylate" suggests that the monomer has a methacrylate structure. Methacrylate generally has the following structure:
- It contains a double bond (alkene) and an ester functional group.
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