Ritika took four metals P, Q, R, and S, and added them to the following solutions one by one. The results are summarised in the given table.

Which of the following statements is correct?

I) Among the given metals, Q is the most reactive metal.

II) S is less reactive than Zn but more reactive than Ag.

III) R is less reactive than Ag but more reactive than Zn.

IV) P is more reactive than Cu but less reactive than Fe.