Which of the following expression in SQL would calculate the square root of 16?

To calculate the square root of 16 in SQL, we use the POWER function, which raises a number to a specified power. The square root of a number x is equivalent to x raised to the power of 0.5. Therefore, POWER(16, 0.5) gives √16 = 4. POWER(16, 2) computes 16² = 256, which is not the square root. MOD(16) is invalid because MOD requires two arguments: the dividend and the divisor. It cannot be used to compute square root.