A neutralization reaction is a:

A neutralization reaction is a double displacement reaction.
A neutralization reaction occurs when an acid and a base interact to form salt and water. 
A displacement reaction is a reaction where one element replaces the other. A decomposition reaction is when a compound breaks down into two or more substances. A combination reaction is a reaction formed from its element or simpler substances. Two compounds react by exchanging their elements or groups in a double displacement reaction.  For example,
${\mathit{ }\mathit{Mg}\left(s\right) + \mathit{CuSO}}_4\left(\mathit{aq}\right) \to \mathit{MgS}{O}_4\left(\mathit{aq}\right) + \mathit{Cu}\left(s\right)$