The equation of a wave disturbance is given as `y=0.02cos((pi)/(2)+50pit) cos(10pix)`, where x an y are in metre and t in second. Choose the wrong statement.
A. Antinode occurs at x=0.3
B. The wave length is 02m
C. The speed of the consituent is 4m/s
D. Node occurs at x=0.15m