student_data = {'id1':   
   {'name': ['Sara'],   
    'class': ['V'],   
    'subject_integration': ['english, math, science']  
   },  
 'id2':   
  {'name': ['David'],   
    'class': ['V'],   
    'subject_integration': ['english, math, science']  
   },  
 'id3':   
    {'name': ['Sara'],   
    'class': ['V'],   
    'subject_integration': ['english, math, science']  
   },  
 'id4':   
   {'name': ['Surya'],   
    'class': ['V'],   
    'subject_integration': ['english, math, science']  
   },  
}  
  
result = {}  
  
for key,value in student_data.items():  
    if value not in result.values():  
        result[key] = value  
  
print(result)  