Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by `(E_(g))_(C),(E_(g))_(Si)` and `(E_(g))_(Ge)`, respectively. Which one of the following relationship is true in their case?

Options

A. `E_(g) (Si) lt E_(g) (Ge) lt E_(g)(C )`
B. `E_(g) (Si) gt E_(g) (Ge) lt E_(g)(C )`
C. `E_(g) (Si) lt E_(g)(Ge) lt E_(g)(C )`
D. `E_(g) (Si) gt E_(g) (Ge) gt E_(g)(C )`

Answer

B

Explanation

`E_(g)(Si) gt E_(g) (Ge) lt E_(g)(C )`