Which of the following are insulator 1 Mica and Quartzs 2...

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Which of the following are insulator?
1. Mica and Quartzs
2. Metal and Rubber
3. Metals and Mica

A. 1 and 2 only

B. 1 and 3 only

C. 2 and 3 only

D. 1 only

Answer: Option D

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