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Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically | |
A. | polymethyl methacrylate (PMMA). [Correct Answer] |
B. | Polytetraflouroethylene(PTFE). [Wrong Answer] |
C. | polycarbonates. [Wrong Answer] |
D. | phenolic resins. [Wrong Answer] |