What is the proper way to write a list comprehension that represents all the keys in this dictionary?

fruits = {'Apples': 5, 'Oranges': 3, 'Bananas': 4}

1.  fruit_names = [x in fruits.keys() for x]
2.  fruit_names = for x in fruits.keys() *
3.  fruit_names = [x for x in fruits.keys()]
4.  fruit_names = x for x in fruits.keys()

Correct Answer:

•  fruit_names = [x for x in fruits.keys()]