Which of the following is used for removing air bubbles from glass during its manufacture?

Option A

Arsenic trioxide, sold under the brand name Trisenox among others, is an inorganic compound and medication. As an industrial chemical, major uses include in the manufacture of wood preservatives, pesticides, and glass. As a medication it is used to treat a type of cancer known as acute promyelocytic leukemia. For this use it is given by injection into a vein.