Answer:
Option d is correct that is 
Step-by-step explanation:
We have been given a complex number 3-3i we have to convert it in the polar form:
polar form of a complex number:

Where, 
the general form of complex number is:
x+iy
Here, x=3 and y=-3
Hence, 
And 



Hence, substituting all the values in polar form formula we get:

Therefore, option d is correct.