The metalloid among these is (b) Germanium.
Metalloids have properties of both metals and non-metals. Germanium is a semiconductor, meaning it conducts electricity under certain conditions, making it useful in electronics. Sodium and magnesium are metals, while oxygen is a non-metal.
Class 9th Science NCERT MCQ Questions
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(b) Germanium, because it has both type of characteristics like metal and non-metal.
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