When substance $A$ reacts with water,it produces a combustible gas $B$ and a solution of substance $C$ in water. When another substance $D$ reacts with solution $C$,it produces the same gas $B$,even when reacting with dilute sulfuric acid at room temperature. $A$ gives a golden yellow flame in a Bunsen burner flame. What are $A, B, C,$ and $D$ respectively?
- A$Na, H_2, NaOH$ and $Zn$
- B$K, H_2, KOH$ and $Al$
- C$Ca, H_2, Ca(OH)_2$ and $Sn$
- D$CaC_2, C_2H_2, Ca(OH)_2$ and $Fe$
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