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In the below map, the black marks show the distribution of
Explanation
The pattern of black marks corresponds to classic mica-producing districts: Bhagalpur in Bihar, several centres in Rajasthan (Ajmer, Bhilwara, Tonk, Udaipur), mica belt in Jharkhand (Singhbhum, Dhanbad, Ranchi) and parts of Andhra Pradesh (Nellore, Krishna, Vishakhapatnam), which are listed as India’s major mica mining areas [1]. Such a distribution—scattered but concentrated in eastern peninsular and parts of Rajasthan and Andhra—matches mica more closely than asbestos, gypsum or limestone, which occur in distinctly different sedimentary belts and coastal/central regions. Therefore the mineral indicated by the black marks on the map is mica (option 4) [1].
Sources
- [1] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 7: Resources > Table 7.12 > p. 23
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