BANK EPFO Stenographer (Group C) Mock Test 2023 General Knowledge Indian Geography Indian Economic and Human Geography

নীচের কোনটিকে 'বাদামী কয়লা (brown coal)' বলে?

1

বিটুমিনাস

2

কোক

3

অ্যান্থ্রাসাইট

4

লিগনাইট

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