A book with many printing errors contains four different expressions for the displacement 'y' of a particle executing simple harmonic motion. The wrong formula on dimensional basis
(i) `y=A sin (2pi t//T)`
(ii) `y=A sin (Vt)`
(iii) `y=A//T sin (t//A)`
(iv) `y=(A)/(sqrt(2))(sin omega t+cos omega t)`

Options

A. ii only
B. ii and iii only
C. iii only
D. iii and iv only

Answer

C