32. Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (E<sub>g</sub>)<sub>C</sub> (E<sub>S</sub>)<sub>Si</sub> and (E<sub>g</sub>)<sub>Ge</sub> respectively. Which one of the following relationships is true in their case ?
(a) \((E_g)_{Si} > (E_g)_{Ge} < (E_g)_C\)
(b) \((E_g)_C < (E_g)_{Si}\)
(c) \((E_g)_C = (E_g)_{Si}\)
(d) \((E_g)_C < (E_g)_{Ge}\)
Answer : (a) \((E_g)_{Si} > (E_g)_{Ge} < (E_g)_C\)
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