Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate?
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The number of free conduction electrons is significant in C but small in Si and Ge
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The number of free conduction electrons is negligibly small in all the three
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The number of free electrons for conduction is significant in all the three
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The number of free electrons for conduction is significant only in Si and Ge but small in C.
