Calamine and Siderite:
Calamine is a mineral that is commonly found as a secondary mineral in the oxidation zone of zinc ore deposits. It is usually associated with zinc ores and is composed of zinc carbonate (ZnCO3). Siderite, on the other hand, is an iron carbonate mineral that is commonly found in sedimentary rocks. It is often associated with iron ore deposits and has a chemical formula of FeCO3.

Magnesite and Dolomite:
Magnesite is a mineral that is composed of magnesium carbonate (MgCO3). It is commonly found in metamorphic rocks and is an important source of magnesium. Dolomite, on the other hand, is a mineral that is composed of calcium magnesium carbonate (CaMg(CO3)2). It is also commonly found in sedimentary rocks and is an important source of magnesium and calcium.

Malachite and Azurite:
Malachite and azurite are both copper carbonate minerals. Malachite has a chemical formula of Cu2(CO3)(OH)2 and is commonly found in the oxidation zone of copper ore deposits. It is known for its vibrant green color and is often used as a gemstone. Azurite, on the other hand, has a chemical formula of Cu3(CO3)2(OH)2 and is also commonly found in the oxidation zone of copper ore deposits. It is known for its deep blue color and is often used as a pigment.

Calcite and Witherite:
Calcite is a common mineral that is composed of calcium carbonate (CaCO3). It is found in a variety of geological settings and is often associated with limestone and marble. Witherite, on the other hand, is a rare mineral that is composed of barium carbonate (BaCO3). It is often found in veins associated with lead and zinc ore deposits.

Conclusion:
The correct combination of minerals is:
a) Calamine, siderite
b) Magnesite, dolomite
c) Malachite, azurite
d) Calcite, witherite

Each combination consists of minerals that have similar chemical compositions or are commonly found together in specific geological settings. It is important to note that these combinations are not exhaustive and there are many other possible combinations of minerals based on their chemical compositions and geological occurrences.