Which of the following organic compounds polymerizes to form the polyester Dacron?

Terepthalic acid and ethylene glycol polymerizes to form the polyester Dacron as shown in the figure.

Dacron, commonly known as terylene, is obtained by heating a mixture of terephthalic acid and ethylene glycol at $420-460 \mathrm{K}$ in the presence of zinc acetate and antimony trioxide as a catalyst.