Mestiylene can be obtained by polymerization of-

Options

A. Ethyne
B. Ethene
C. Propene
D. Propyne

Explanation

To determine what mesitylene can be obtained from through polymerization, we need to analyze the process of polymerization involving alkynes.

### Step-by-Step Solution:

1. **Understanding Mesitylene**: Mesitylene is a compound with the chemical formula C9H12, also known as 1,3,5-trimethylbenzene. It has a benzene ring with three methyl groups attached to it.

2. **Polymerization Process**: Mesitylene can be synthesized through the polymerization of alkynes. Specifically, we need to focus on how three or more molecules of an alkyne can combine to form a cyclic structure.

3. **Identifying Alkynes**: The simplest alkyne is ethyne (C2H2), but when three molecules of ethyne undergo polymerization, they form benzene (C6H6), not mesitylene. Therefore, ethyne is not the correct precursor.

4. **Using Propyne**: Propyne (C3H4) is a better candidate. When three molecules of propyne are combined, they can undergo a polymerization reaction to form mesitylene. The reaction occurs under specific conditions, such as high temperature (around 873 K) and in the presence of a catalyst (like red-hot iron).

5. **Formation of Mesitylene**: The polymerization of three propyne molecules results in the formation of a cyclic compound that is 1,3,5-trimethylbenzene (mesitylene). The structure can be visualized as a benzene ring with three methyl groups attached at the 1, 3, and 5 positions.

6. **Conclusion**: Therefore, the answer to the question is that mesitylene can be obtained by the polymerization of propyne.

### Final Answer:
Mesitylene can be obtained by the polymerization of **propyne**.