Metal $M +$ air $\xrightarrow{\Delta } A$ $\xrightarrow{H_2O} B$ $\xrightarrow{HCl}$ White fumes; Metal $M$ can be
- A$Li, Mg$
- B$Li, Al$ or $K$
- C$Na, K$ or $Mg$
- D$Li, Na$ or $K$
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