Answer:
C. II and III only is correct.
Explanation:
We are given the graphs of the functions and are required to find the sinusoidal graph.
According to the options, we see that,
Graph I can never be the graph of a sine function as it is not repeating.
Graph II and III are periodic and also can be obtained by applying some translations to the parent function
Hence, we get that,
Graph II and III represents sinusoidal functions.
Thus, option C i.e. II and III only is correct.