Which pointer control is used for line pointer control in SAS?

The correct pointer control used for line pointer control in SAS is identified as the "n" control. In this context, the line pointer control refers to how data lines are read or processed in a data step.

The option denoted as "#n" specifically indicates to move the pointer forward by "n" lines. This pointer control is particularly useful when you need to skip a specified number of lines in the input data. For instance, using "#2" would move the input pointer down two lines from the current position, allowing you to read data from a specific line further down in a text file.

The other options represent different functionalities in SAS. The control "@n" is used for holding the current line while you process multiple variables, "+n" provides the ability to move forward by "n" columns on the same line, and "/" signifies the end of the current input line and moves to the next line. Each of these serves specific purposes, but when it comes to direct control over line movement in the data input process, "#n" is the correct choice.