Which of the following ores are correctly matched against reduction method ? (a) Self reduction ...

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Which of the following ores are correctly matched against reduction method ?
(a) Self reduction : \( \mathrm{Cu}_{2} \mathrm{~S}, \mathrm{ZnS} \)
(b) Electrolytic reduction : \( \mathrm{Al}_{2} \mathrm{O}_{3}, \mathrm{Fe}_{2} \mathrm{O}_{3} \)
(c) Goldschmidt alumino thermite : \( \mathrm{MgCl}_{2}, \mathrm{Cr}_{2} \mathrm{O}_{3} \)
(d) Carbon reduction: \( \mathrm{SnO}_{2}, \mathrm{Fe}_{2} \mathrm{O}_{3} \)
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