पृथ्वी की ऊपरी परतभूपर्पट� – McqOptions

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1.	पृथ्वी की ऊपरी परतभूपर्पटीमें किस तत्व की मात्रा सर्वाधिक हैं ?
A.	ऑक्सीजन
B.	लोहा
C.	एल्योमिनियम
D.	इनमें से कोई नहीं
Answer» B. लोहा

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