Step 1: Understanding the Question.
Judicial control over delegated legislation can be exercised on grounds such as the doctrine of ultra vires (exceeding authority), mala fides (bad faith), and exclusion of judicial review, where the legislation attempts to oust court jurisdiction.
Step 2: Conclusion.
Thus, all the options (a), (b), and (c) are valid grounds, making (d) All of the above the correct answer.