A) polonium
B) manganese
C) tin
D) lead
Correct Answer: B
Solution :
Pyrolusite is an ore of manganese. The formula of pyrolusite is \[Mn{{O}_{2}}\]. Note- The other ores of manganese are Braunite \[M{{n}_{2}}{{O}_{3}}\] Hausmannite\[M{{n}_{3}}{{O}_{4}}\]
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