Indexes - 2

Which of the following statement is true about row locators in non-clustered indexes in MS SQL Server?

If the table does not have a clustered index, the row locator is the clustered index key for the row.
If the table has a clustered index, or the index is on an indexed view, the row locator is a pointer to the row.
If the table has a clustered index, or the index is on an indexed view, the row locator is the clustered index key for the row.
None of the above-mentioned statement is true.