Pick out the incorrect statement.

Here statement in option B is incorrect as when $C{O}_{2}$ is passed in lime-water, it becomes milky due to the formation of $CaC{O}_{3}$ but excess of $C{O}_{2}$ leads to the formation of clear solution, due to the formation of soluble $Ca ( HC{O}_{3}{)}_{2}$ .

A. $Mg + C{O}_{2} \to 2MgO + C$
and $2Mg + S{O}_{2} \to 2MgO + S$

D. Inter-atomic forces (or metallic bonding) in alkaline-earth metals are stronger than in alkali metals.