Answer: THE LAST OPTION (NO REAL ROOT).
Explanation:
1. As you can see, the fraction given in the problem above have a negative sign:
-9/16
2. By definition, if a number is negative then it does not have real root.
3. Keeping this on mind, you can conclude that the number square root of -9/16 does not have real root.
Therefore, the answer is the last option.