The answer is A. The program prints:
I

Why?
word[1:2] is a slice: it starts at position 1 and stops before position 2. Positions count from 0.
Trace table
A trace table follows the program step by step. Here’s this one:
| position | letter |
|---|---|
| 0 | P |
| 1 | I |
| 2 | X |
| 3 | E |
| 4 | L |
The code again
word = "PIXEL"
print(word[1:2])
Try it: change one number in the program and predict the new output before you run it.