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Koderma, in Jharkhand, is the leading producer of which one of the following minerals?
A. Bauxite
B. Copper
C. Iron-ore
D. Mica

Answer
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Hint: Micas are a collection of minerals whose exceptional physical feature is that separate mica crystals can effortlessly be fragmented into very thin elastic plates. This feature is defined as flawless basal cleavage. Mica is ordinary in igneous and metamorphic rock and is infrequently discovered as tiny flecks in sedimentary rock.

Complete answer:
Koderma is recognized as the world's major preserve of mica and was once a lively town along with its neighborhood town Jhumri Telaiya. Throughout the 1960s, the city had one of the world's chief mica moguls and dealers. USSR was the major customer of mica's mined from Koderma and transferred there for manufacturing space and military gears. Afterward, Govt. of Bihar took over the mica mines under Bihar Mica Syndicate which got shaped as Bihar State Mineral Development Corp. (nowadays Jharkhand State Mineral Development Corporation). Tilaiya Hydel Power Plant was constructed at Tilaiya Dam which got recognized in 1953 by Damodar Valley Corporation. Koderma Thermal Power Station a coal-founded 1000Mega Watt power plant of DVC was recognized in 2012 commissioning thousands of individuals. Hazaribagh-Koderma Industrial Area established by RIADA and functions numerous minor & middle scale businesses in the area. R.K. Sahana & Sons (Sahana Minerals) are one of the chief miners of mica, quartz, and felspar in Koderma.

Thus, option (B) is correct.

Note: Koderma is encircled by forests. The key drivers of the region are Barakar, Barsoi, and Sakri. Dhawajadhari Pahar is a hill devoted to Lord Shiva, where at Mahashivratri many followers accumulate to venerate the god. Chanchal Dham (mountain) which is situated 12 kilometers away from Nawadih railway station and 30 kilometers from Koderma Junction railway station, is devoted to Maa Chanchalni.

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