Final answer:
The code will output the number 3, as the line with '# x = 4' is a comment and does not change the value of x.
Step-by-step explanation:
The result of the given code chunk will be 3. The line # x = 4 is a comment and does not affect the execution of the code. Comments in Python are indicated by the # symbol and are ignored by the interpreter when the code is run. Since x is set to 3 before the comment and there are no other assignments to x, the print(x) statement will output 3.