An unspecified intrinsic semiconductor at temperature T = 300 K has 7 x 10^14 electrons/cm³ in its conduction band. What is the density of holes in the valence band for this material? (Multiple Choice Question)
a) 7 x 10^14 holes/cm³
b) 0 holes/cm³
c) Depends on the band gap
d) Cannot be determined from the given information
