Which of the following should be true of the object thrown

Which of the following should be true of the object thrown by a thrown statement?

1. Should be assignable to Error type
2. Should be assignable to Throwable type
3. Should be assignable to Exception type
4. Should be assignable to String type
5. None of these

The throw statement should be assignable to the throwable type. Throwable is the super class of all exceptions.