Which of the following pair(s) is/are correctly matched?

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Which of the following pair(s) is/are correctly matched?
Material Application
(A) Rochelle salt — Phonograph
(B) Barium titanate — Amplifier
(C) Quartz — Oscillator.
Select the correct answer using the codes given below:

1. only 2
2. 1 and 2
3. 1 and 3
4. 2 and 3

Correct Option: C

NA