Answer: Python Puzzler #2874

The answer is A. The program prints:

[1, 4, 7]

This answer was checked by running the program for real.

Why?

range(1, 9, 3) counts from 1 in steps of 3 and stops before 9.

The code again

print(list(range(1, 9, 3)))

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