Answer: Python Puzzler #1138

The answer is A. The program prints:

[6, 10, 14]

Checked by running the program for real.

range(6, 18, 4) counts from 6 in steps of 4 and stops before 18.

print(list(range(6, 18, 4)))

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