Regarding a semiconductor which one of the following statements is wrong?

Options

A. There are no free electrons at 0K
B. There are no free electrons at room temperature.
C. The number of free electrons increases with rise of temperature
D. The charge carriers are electrons and holes

Answer

B

Explanation

In semiconductor, no covalent bond breaks at 0k, so no electron is free at 0K. At room temperature some covalent bonds break, so some electrons and holes become free. More covalent bond break at high temperature and so number of free electrons increases at high temperature.