Which of these is a properly formatted dictionary?

Question

socks = {'light': 4.99, 'medium': 8.99, 'heavy': 9.99]
socks = ['light': 4.99, 'medium': 8.99, 'heavy': 9.99]
socks = [['light': 4.99], ['medium': 8.99], ['heavy': 9.99]]
socks = ('light': 4.99, 'medium': 8.99, 'heavy': 9.99)

Answer 1

The properly formatted dictionary is:

socks = {'light': 4.99, 'medium': 8.99, 'heavy': 9.99}