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:

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

1.	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:
A.	only 2
B.	1 and 2
C.	1 and 3
D.	2 and 3
Answer» D. 2 and 3

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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:

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