When a wave goes from one level to another, there is a change

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When a wave goes from one level to another, there is a change in the
(i) Velocity
(ii) Amplitude
(iii) Frequency
(iv) Wavelength
Choose the correct answer

1. Only (i)
2. (i) and (ii)
3. (i), (ii) and (iv)
4. All of them

Correct Option: C

NA