Three simple harmonic motions in the same direction having same amplitude and the same period are superposed. If each differs in phase from the next by `lambda//2` then which of the following is wron.
(`i`) Resultant amplitude is `(sqrt(2)+1)` a
(`ii`) Phase of resultant motion relative to first is `90^(@)`
(`iii`) The energy associated with the resulting motion is `3` times the energy associated with any single motion

Options

A. (`i`) & (`iii`)
B. (`ii`) only
C. (`ii`) & (`iii`)
D. (`i`) (`ii`) & (`iii`)