निम्नलिखित में से किसे एक � – McqOptions

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1.	निम्नलिखित में से किसे एक स्नेहक के रुप में भी प्रयोग किया जाता है।
A.	क्यूप्राइट
B.	ग्रेफाइट
C.	हेमाटाइट
D.	क्रायोलाइट
Answer» C. हेमाटाइट

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