Consider the following reactions :

$\mathit{CuS}{O}_4+\mathit{Fe }\to \mathit{ FeS}{O}_4+\mathit{Cu}$

$\mathit{FeS}{O}_4+\mathit{Zn }\to \mathit{ ZnS}{O}_4\mathit{}+\mathit{Fe}$

Which one of the following statements is correct?

Metals that can displace other metals from their solution are comparatively more reactive than the metal present in the solution.

For the first reaction, Fe is more reactive than Cu, so displacement occurs and the product is $\mathit{ FeS}{O}_4$. 
$\mathit{CuS}{O}_4+\mathit{Fe }\to \mathit{ FeS}{O}_4+\mathit{Cu}$
 

For the second reaction, Zn is more reactive than Fe, so the end of the displacement reaction product is $\mathit{ FeS}{O}_4$. Zinc displaces iron from $\mathit{FeS}{O}_4$ and iron displaces copper from $\mathit{CuS}{O}_4$.
 
$\mathit{FeS}{O}_4+\mathit{Zn }\to \mathit{ ZnS}{O}_4\mathit{}+\mathit{Fe}$