Metal ‘X’ displaces metal ‘Y’ from its salt solution but is not able to displace metal ‘Z’ from its salt solution. Identify the most reactive metal.

Metal ‘X’ displaces metal ‘Y’ from its salt solution, so ‘X’ is more reactive than ‘Y’. Metal ‘X’ Can not displace metal ‘Z’ from its salt solution, so ‘Z’ is more reactive than ‘X’