Choose the correct statement about P-type and N-type semiconductor.
1
P-type is intrinsic and N-type is extrinsic semiconductor.
2
Majority charge carrier of P-type is electrons and that of N-type is holes.
3
When trivalent impurity is added in intrinsic then P-type is formed and when pentavalent is added then N-type is formed.
4
All are correct.