Explanation:

- Section 86: This section of the Indian Evidence Act specifies that certified copies of foreign judicial records are presumed to be genuine if they appear to be duly certified. It deals with the presumption regarding foreign judicial records.

- This is the correct option for presumption as to certified copies of foreign judicial records.

- Section 16: This section is related to the relevancy of the existence of course of business, making it easier to ascertain any relevant fact.

- Section 13: This section talks about facts relevant when the right or custom is in question, dealing with rights, customs, or duties and their transaction.

- Section 18: This section defines admissions and details about the persons who can make admissions, and to whom they are relevant.