<prompt> Which of the following has to be present for diagnosis of major depressive disorderLoss of interest or pleasureRecurrent suicidal tendencyInsomniaIndecisiveness  <response>: In typical depressive episodes of all three varieties described below mild, moderate, and severe, the individual usually suffers from depressed mood, loss of interest and enjoyment, and reduced energy leading to increased fatigability and diminished activity. Reference: International classification of diseases 10, page 119. 