The answer is C. The program prints:
N

Why?
word[2:3] is a slice: it starts at position 2 and stops before position 3. Positions count from 0.
Trace table
A trace table follows the program step by step. Here’s this one:
| position | letter |
|---|---|
| 0 | B |
| 1 | I |
| 2 | N |
| 3 | A |
| 4 | R |
| 5 | Y |
The code again
word = "BINARY"
print(word[2:3])
Try it: change one number in the program and predict the new output before you run it.