The resident has a diagnosis of depression upon admission and hasn been on an antidepressant since admission three years ago

The resident has a diagnosis of depression upon admission and hasn been on an antidepressant since admission three years ago. No physician or non-physician practitioner has written or signed any diagnosis for this resident in the past three months. The nurse assessment coordinator (NAC) calls the physician's office and requests an updated, signed diagnosis list, but did not receive a response. Based on this scenario, which of the following is correct?
The diagnosis of depression does go on the current MDS because the resident is receiving a medication indicating active diagnosis.
The diagnosis of depression does not go on the current MDS because there is no physician or non-physician documentation of the diagnosis in the 60-day look-back.
The diagnosis of depression must be checked "unknown" using the 'dash.'
The diagnosis of depression must be entered in I8000 as an ICD-10 code, but the box in I5800 must not be checked