Explanation:
Block Media Recovery restores and recovers the specified blocks. You can use the new BLOCKRECOVER statement to perform BMR.
Incorrect Answers:
1: It does not only recover the specific blocks but also restores blocks.
2: It does not replace bad blocks by substituting good blocks.
3: Block Media Recovery does not use the DBMS_REPAIR package to fix block corruptions.
Reference:
OCP Oracle9i Database: New Features for Administrators, Daniel Benjamin, p. 186
Chapter 3: Manageability Enhancements
Oracle 9i New Features, Robert Freeman, p. 84-86
Chapter 3: New Oracle9i Availability and Recoverability Features

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