You're asking about the least reactive metal! This is determined by the electrochemical series, which ranks metals based on their tendency to lose electrons and form positive ions.

Here's the key:

* Metals higher in the electrochemical series are more reactive. They readily lose electrons and are easily oxidized.

* Metals lower in the electrochemical series are less reactive. They have a lower tendency to lose electrons and are harder to oxidize.

Therefore, the metal that cannot be oxidized by any other metal on the list is the one lowest in the electrochemical series.

To answer your question definitively, I need to know the specific list of metals you're referring to. Please provide that list, and I can tell you which metal is the least reactive.