Which of the following statements about wave is not correct? i. A wavefront is a line which contains all particles whose vibration are in phase. ii. The direction of propagation of a wave is the link drawn parallel to the wavefront. iii. A wavefront is a circle which is common to particles that are in the same state of disturbance
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A.
i only -
B.
ii only -
C.
i and ii only -
D.
i and iii only -
E.
ii and iii only