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Magnetite is considered the finest iron ore variety because it has:
Answer & Solution
Correct answer: B.
1. NCERT compares iron ore varieties by their iron content.
2. Magnetite has up to 70% iron — the highest grade among common iron ores.
3. Haematite is the most important industrial ore due to abundance, while magnetite leads in purity.
_Source: NCERT Class 10 Geography Contemporary India - II, Ch 5 "Minerals and Energy Resources", §Iron Ore ¶2_
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