Key features of depression and its management in general practice.

 
"..I've been possessed by the devil"

Which of the following questions are true of Omar's presentation?
1. Omar is suffering from major depressive disorder with melancholia.
2. Guilt is a prominent feature of major depressive disorder with melancholic features.
3. Diurnal variation is a prominent feature of major depressive disorder with melancholic features.
4. Major depressive disorder with melancholic features is usually precipitated by environmental stress.
5. Major depression with melancholic features typically responds poorly to antidepressants.