Answer: irrelevant
Step-by-step explanation: In simple words, something is termed as irrelevant if it is of no use or importance to the user of that thing.
In the given case, John carter wanted to know the cause of increasing attrition but the HR provided him with the report of new hires. That report will be of no use to the John in his study no matter if it is accurate or not.
Hence from the above we can conclude that the report is irrelevant.