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.
5. None of these