65.
The answer is: A
Explanation
The correct option is A: A specific person.
Jus in personam is a Latin term which means right against a person. It means the right to enforce a particular person’s obligation by instituting an action against such person.
For example, if A sells his house to B, then A has a right to receive the payment from B. This is a right in personam, because it is available only against B and not anyone else.