Which of the following materials is a semiconductor? 1.Silicon 2.Gallium arsenide 3.Germanium Select the correct answer from the codes given below: |ForumIAS

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[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: D

Notes: