A set of interrogatories is an example of the discovery of a civil case in a court, therefore, the correct option is - a).
Interrogatories are formal sets or lists of questions that are sent to the other party that s/he must respond to in writing. It is also known as requests for further information and needed to be responded to these questions by an adversary.
Thus, the correct option is - a) interrogatives are examples of discovery.
Learn more about discovery tool or stage:
https://brainly.com/question/7942258