Final answer:
The length of time negative results are kept on file varies based on the type of test, institutional policies, and applicable laws; the retention period could be 1, 5, 10 years, or indefinite.
Step-by-step explanation:
The duration for which negative results are kept on file can vary depending on the specific context, such as the type of test (medical, legal, etc.),
the policies of the institution, and the laws of the jurisdiction. Without more specific information,
it is not possible to accurately determine whether the correct answer is 1 year, 5 years, 10 years, or indefinitely.
It's crucial to refer to the guidelines of the particular entity or legislative requirements to find the precise retention time for negative results.