Explanation:
This utility can work for a database with any data block size. BLOCK SIZE parameter specifies the database block size explicitly for all cases in which the block size for the Oracle database is not 2K (2,048 bytes).
Incorrect Answers:
2: The utility CAN verify data files for a database with any DB_BLOCK_SIZE greater than 2K bytes.
3: The utility CAN verify data files for a database with any DB_BLOCK_SIZE less than or equal to 4K bytes.
4: The utility CAN verify data files for a database with any DB_BLOCK_SIZE less than or equal to 8K bytes.
Oracle 8, DBA Certification Exam Guide, Jason S. Couchman, p. 659-661
Chapter 14: database Failure and Recovery

---