Consider the following statements about semiconductors?
1. The forbidden energy gap in semiconductors lies between the valence band and conduction band.
2. The forbidden energy gap in germanium at 0 K is about 0.71 eV.
3. Semiconductors have negative temperature coefficient of resistivity.
Which of the statements given above are correct?

A. 1, 2 and 3

B. 1 and 2

C. 2 and 3

D. 1 and 3

Answer: Option A