<prompt> Two months after knowing that his son was suffering from leukemia, a 45 year old father presents with sleep deprivation, lethargy, headache, and low mood. He interacts reasonably well with others, but has absented himself from work. The most probable diagnosis is:DepressionPsychogenic headacheAdjustment disorderSomatization disorder  <response>: Here, the diagnosis is adjustment disorder. The symptoms are not severe enough to qualify for the diagnosis of depression and there is a clear history of a stressor diagnosis of leukemia in son. The symptoms of adjustment disorder usually sta within 3 months of the stressor 