<h2>
Answer:</h2>
The function which best describe the graph is:
C. y=csc x
<h2>
Step-by-step explanation:</h2>
By looking at the graph we observe that the graph repeats itself after every 2π i.e. the period of the function is 2π.
Also, we know that the function " tan x " and " cot x " have a period of π.
Hence, option: A and option: D is discarded.
Now by looking at the graph we observe that when x → 0 then the graph of the function tends to infinity
i.e. when x → 0 then y → ∞
B)

when x=0
then

Hence, option: B is incorrect.
So, we are left with option: C
i.e.

when we plot the graph of this function we observe that it matches the given graph.
The correct answer is:
Option: C