Answer: Python Puzzler #3022

The answer is C. The program prints:

[1, 5, 9]

This answer was checked by running the program for real.

Why?

range(1, 10, 4) counts from 1 in steps of 4 and stops before 10.

The code again

print(list(range(1, 10, 4)))

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