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The ADA specification No 1 for composition of amalgam alloy recommends______________?

The ADA specification No 1 for composition of amalgam alloy recommends______________?

A. 65% silver, 32% tin and 3% copper
B. 49% silver, 32% tin and 19% cooper
C. 65% silver, 29% tin and 5-6% copper
D. None of the above