Answer: Python Puzzler #899

The answer is C. The program prints:

[4, 6, 8, 10, 12, 14, 16, 18]

Checked by running the program for real.

range(4, 20, 2) counts from 4 in steps of 2 and stops before 20.

print(list(range(4, 20, 2)))

Try it: change one number in the program and predict the new output before you run it.