निम्नलिखित में से किस खनिज – McqOptions

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1.	निम्नलिखित में से किस खनिज मे ऑक्सीजन नहीं होती है?
A.	क्रायोलाइट
B.	बॉक्साइट
C.	कैल्साइट
D.	हेमाटाइट
Answer» B. बॉक्साइट

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