Which of the following non-metals is a good conductor of electricity?
ABromine
BHydrogen
CGraphite
DPhosphoru
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താഴെ കൊടുത്തിരിക്കുന്നവയിൽ ഏതിലാണ് ഫിലമെന്റ് ചൂടാക്കി പ്രകാശം തരുന്നത് ?
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