Consider the following statements:
1. Crystal oscillator
2. Wein bridge oscillator
3. R-C phase shift oscillator
4. Resonant frequency
Which of the above sinusoidal oscillators can be used as variable audio frequency oscillators?1
1 and 2
2
2 only
3
2 and 3
4
3 and 4
5
1, 2 and, 3