When at the rightmost cell in a row, press the enter key to move to the first cell in the next row; do not press the tab key.
a) true
b) false

The following statement is False.

Explanation:

The following statement is not true because when the excel user wants to move towards the right cell from the current cell then, the user presses the Tab key but it does not move towards the rightmost side of the row. They press Enter key to move on the next in the downward direction cell from the current cell, if the user in the last cell and he press enter key then, he move to the first cell. So, that's why the following statement is false.