मध्यप्रदेश में कोयले की खानें मुख्यत: किस कल्प की हैं ? - The coal mines in Madhya Pradesh are mainly of which era? - MadhyaPradesh Me Koyale Ki Khanein Mukhyat: Kis Kalp Ki Hain ? MP Gk in hindi, MPPSC Quiz Gondwana Kalp question answers in hindi pdf Third Kalp questions in hindi, Know About Chaturth Kalp MP Gk online test MP Gk notes in hindi quiz book Vindhya Kalp
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Answer is B.