Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?
Among all the available options Steel is the alloy of iron which contains the non-metal carbon in it.
Bronze consists primarily of copper and 12% tin
Brass is an alloy of copper and zinc.
Amalgam is an alloy of mercury.
So the correct answer is d.