Carbon,silicon,and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by $(Eg)_C$,$(Eg)_{Si}$,and $(Eg)_{Ge}$ respectively. Which one of the following relationships is true in their case?
- A$(Eg)_C > (Eg)_{Si}$
- B$(Eg)_C < (Eg)_{Si}$
- C$(Eg)_C = (Eg)_{Si}$
- D$(Eg)_C < (Eg)_{Ge}$
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