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What is the change in the oxidation number of calcium in the following reaction Ca + 2H 2 O Ca(OH) 2 + H 2 A.

What is the change in the oxidation number of calcium in the following reaction

Ca + 2H2O Ca(OH)2 + H2

A. -2 to +1
B. 0 to +1
C. 0 to +2
D. +2 to -1
E. -2 to 0

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