You can take up any course in graduation. If you perform well in your graduation and succeed in getting a 95+ percentile in CAT you can definitely get an IIM. 

Moreover your graduation syllabus, if you take economics as your subject, will be really helpful in your MBA studies as your prior knowledge will help in your management studies. 

But you can take history also. This won't make much difference in getting into an IIM. Just perform well in both academics and CAT. 

All the very best