কোনটি অর্ধ-পরিবাহী (semi-conductor) নয়?

MCQ Practice Chemistry

কোনটি অর্ধ-পরিবাহী (semi-conductor) নয়?

ক গ্যালিয়াম

খ জার্মেনিয়াম

গ লোহা

ঘ সিলিকন

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