A) \[2Mg+{{O}_{2}}\to 2MgO\]
B) \[{{N}_{2}}+3{{H}_{2}}\to N{{H}_{3}}\]
C) \[~2{{H}_{2}}O\to 2{{H}_{2}}+{{O}_{2}}\]
D) Both [a] and [b]
E) None of these
Correct Answer: D
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