Which of the following statement(s) is/are true \( \mathrm{P} \) re...

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Which of the following statement(s) is/are true
\( \mathrm{P} \) regarding the electrical properties of solids?

W
(a) (Conductivity) metals \( \) (Conductivity) insulators \( \) (Conductivity) semiconductors.
(b) Depending upon the temperature, \( \mathrm{TiO}_{3} \) can behave as insulator or conductor.
(c) \( \mathrm{I}_{2}(\mathrm{~s}) \) is non-conducting.
(d) n-type semiconductor will have conductivity less than pure semiconductor.
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