Calamine is an ore of:

First, let us recall what calamine actually is. In mineralogy, the term “calamine” traditionally refers to a naturally occurring zinc carbonate, whose chemical formula is written as $$ZnCO_3$$. In many deposits it is found mixed with small amounts of $$ZnO$$ and other impurities, but the essential metal present is zinc.

Now, when the question asks “Calamine is an ore of ______,” we must identify which metal can be commercially extracted from this mineral. Because the cation in $$ZnCO_3$$ is $$Zn^{2+}$$, the metal obtainable from calamine is zinc.

So, among the given options—Iron, Copper, Aluminium, and Zinc—the only correct match is Zinc.

Hence, the correct answer is Option D.