Select the Functions That Have Identical Graphs $y = \sin x$

Multiple Choice

Select the functions that have identical graphs.
-(i) $y = \sin x$
(ii) $y = \cos \left( x + \frac { 3 \pi } { 2 } \right)$
(iii) $y = \cos x$

A) $i$ and iii
B) ii and iii
C) $i$ , ii and iii
D) $\mathrm { i }$ and ii