The compound ‘X’ in this reaction is

-NH- group is an EDG (activating group towards ESR)-CO- group is an EWG (deactivating group towards ESR)Activating groups are o, p - directing groupsDeactivating groups are m - directing groupsThe incoming electrophile N+O2 goes to ortho and para positions of activating group (-NH-) where para isomer is the major product due to steric reasons.