Final answer:
The correct expression is √16 - 5, which equals -1 after calculating the square root of 16 to be 4 and subtracting 5.
Step-by-step explanation:
The expression for 'Five less than the square root of sixteen' is '√16 - 5'. To solve it, first calculate the square root of sixteen, which is 4, because 4 times 4 is 16. Then, subtract 5 from 4, which gives us -1. Therefore, the correct expression and solution is '√16 - 5 = -1' which is not listed as an option among a) 9, b) 7, c) 6, or d) 11, indicating a possible typo in the provided options.