Which of the following statements is NOT correct?

The correct answer is Option (1) → The majority carriers in p-type semiconductors are electrons.

The question asks for the incorrect statement. Each option is judged below.

Option (1) The majority carriers in p-type semiconductors are electrons. — False statement. In a p-type semiconductor the majority carriers are holes; electrons are the minority carriers. This is the statement that is not correct.

Option (2) Doping pure germanium with pentavalent impurities gives n-type semiconductors. — True statement. Pentavalent atoms (such as arsenic or phosphorus) donate an extra electron, so doping germanium with them gives an n-type semiconductor.

Option (3) The resistance of intrinsic semiconductor decreases with increase of temperature. — True statement. Heating frees more electron-hole pairs in an intrinsic semiconductor, so the resistance decreases as the temperature rises.

Option (4) The conduction band have most electrons coming from the donor impurities. — True statement. In an n-type semiconductor most of the conduction electrons come from the donor impurities.

NCERT (2026-27):
n-type Semiconductor – “… Hence in an extrinsic semiconductor doped with pentavalent impurity, electrons become the majority carriers and holes the minority carriers. These semiconductors are, therefore, known as n-type semiconductors.”

p-type Semiconductor – “… Thus, for such a material, the holes are the majority carriers and electrons are minority carriers. Therefore, extrinsic semiconductors doped with trivalent impurity are called p-type semiconductors.”

Extrinsic Semiconductor – “… So the conduction band will have most electrons coming from the donor impurities, as shown in Fig. 14.9(a).”