Let n_p and n_e be the number of holes and conduction electrons in an intrinsic semi conduction

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n_p > n_e

n_p = n_e

n_p < n_e

n_p $\neq$ n_e

answer is B.

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Detailed Solution

In an intrinsic semiconductor, number of holes carriers are equal to number of electrons as no doping is there in intrinsic material.
In extrinsic materials, due to doping, numbers of holes are different to those of electrons.
So,
n_p= n_e

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