Which of the following statements correctly describes Isolation and…

Which of the following statements correctly describes Isolation and Transaction Isolation Levels in a database system? Statement-1: Ensuring the isolation property is the responsibility of a component of the database system called the concurrency-control system. Statement-2: The isolation levels may be Serializable, Repeatable read, Read committed, Read uncommitted and all the isolation levels additionally disallow dirty writes, that is, they disallow writes to a data item that has already been written by another transaction that has not yet committed or aborted.