A student, took four metals P, Q, R and S and carried out different experiments to study the properties of metals. Some of the observations were
All metals could not be cut with knife except metal R.
Metal P combined with oxygen to form an oxide.M,0, which reacted with both acids and bases.
Reaction with water.
P- Did not react either with cold or hot water but reacted with steam
Q- Reacted with hot water and the metal started floating
R- Reacted violently with cold water
S- Did not react with water at all
Based on the above observations answer the following:
Metal which forms amphoteric oxides is

Options

A. P
B. Q
C. R
D. S