Answer:
To express 5 2/3 in radical form, we need to convert the mixed number to an improper fraction.
5 2/3 is equivalent to (5 * 3 + 2) / 3 = 17/3.
Now, let's simplify the radical form:
√(17/3) = √(17) / √(3).
Therefore, the answer is not one of the given options. The radical form of 5 2/3 is √(17) / √(3).