Answer: Python Puzzler #1203

The answer is B. The program prints:

[4, 7, 10, 13, 16]
What the program prints
Checked by running the program for real.

Why?

range(4, 19, 3) counts from 4 in steps of 3 and stops before 19.

The code again

print(list(range(4, 19, 3)))

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