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Wires P and Q have the same resistance a...

Wires `P` and `Q` have the same resistance at ordinary (room) temperature. When heated, resistance of `P` increases and that of `Q` decreases. We conclude that

A

P and Q are conductors of different materials

B

P is n-type semiconductor and Q is p-type semiconductor

C

P is semiconductor and Q is conductor

D

P is conductor and Q is semiconductor

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