Assertion: Metallic minerals are the sources of metals.
Reasoning: Bauxite is an important ferrous mineral found in North Western Region of India.

Assertion (A) is true but Reasoning (R) is not correct.

Metallic minerals are the sources of metals. Iron ore, copper, gold produce metal and are included in this category. Metallic minerals are further divided into ferrous and non-ferrous metallic minerals. Ferrous, as you know, refers to iron. All those minerals which have iron content are ferrous such as iron ore itself and those which do not have iron content are non-ferrous such as copper, bauxite, etc.