Electrons in the last shell of $$X$$, $$Y$$, $$W$$ and $$Z$$ are $$2$$, $$6$$, $$4$$ and $$1$$ respectively. Which of the following statement is correct?

A

melting point of compound formed by $$X$$ and $$Y$$ is more than that of by $$W$$ and $$Z$$.

B

compound formed by $$X$$ and $$Y$$ is more volatile than that of by $$W$$ and $$Z$$.

C

melting point of compound formed by $$X$$ and $$Z$$ is more than that of by $$W$$ and $$Y$$.

D

Incomplete information so inference cannot be drawn.