Which of the following is an example of using keyword arguments in a function?

Using keyword arguments in a function allows you to specify arguments by name rather than by their position in the function call. This can enhance the readability of your code and make it easier to understand which values correspond to which parameters, especially when there are multiple parameters involved.

In option B, the function call complex(real=3, imag=5) clearly demonstrates the use of keyword arguments. Here, real and imag are explicitly named when passing their respective values. This means that even if the order of the parameters were to change, the assignment of values would still be clear and correctly assigned to the respective parameters. This is particularly useful in functions with many parameters or optional parameters, where the order might lead to confusion.

In contrast, other choices do not utilize keyword arguments. Option A simply provides positional arguments without names. Option C makes use of argument unpacking through a list, which does not involve specifying any parameter names. Lastly, option D employs unpacking of a dictionary to provide arguments, but it is not classified as using keyword arguments in the straightforward sense, as it relies more on positional unpacking rather than direct naming of parameters in the function call.