1. Correct Answer
   Incorrect Answer
   a
2. Correct Answer
   Incorrect Answer
   b
3. Correct Answer
   Incorrect Answer
   c
4. Correct Answer
   Incorrect Answer
   d

`substring(1, 6)` extracts `"aunch"` (from index 1 to 5), and `"LaunchCode".length()` is 10. So, the output is `aunch10`