Identify the correct statements among the following.

(A) The number of electrons ($n_e$) is more than the number of holes ($n_h$) in intrinsic conductors.
(B) Semiconductors are elements (Si, Ge) type as well as compounds (GaAs, CdS).
(C) The number of charge carriers can be changed by 'doping' of a suitable impurity in pure semiconductors.
(D) Holes are essentially electron vacancies in a valence band.

Choose the correct answer from the options given below:

(B), (C) and (D) only

The correct answer is Option (4) → (B), (C) and (D) only

(A) The number of electrons ($n_e$) is more than the number of holes ($n_h$) in intrinsic conductors. (Incorrect)
(B) Semiconductors are elements (Si, Ge) type as well as compounds (GaAs, CdS). (Correct)
(C) The number of charge carriers can be changed by 'doping' of a suitable impurity in pure semiconductors. (Correct)
(D) Holes are essentially electron vacancies in a valence band. (Correct)