Hansraj College, University of Delhi

Yes, he can easily get admission in Hansraj College and even some other colleges of the university too.

With general category, 88.4% won't help you to get in Hansraj. But if you have reservations then you might have a chance.
https://www.shiksha.com/humanities-social-sciences/articles/du-admissions-2017-cutoffs-declared-blogId-14571

North campus colleges generally have a greater percentage cutoff and that also depends on the course which you want to take admission in. You can try for south campus colleges. They are also pretty good. Otherwise, you can keep a check on merit list as colleges release a number of lists and each list has a lower percentage than the previous one.

No, Hansraj College doesn't offer Political Science Honors but there are many other colleges that offer this course so please refer those.

Yes, DU from 2018 said that maths is compulsory to get admission in B.Com or B.Com honours.

Not surely possible. Still, you can take a chance to apply for university, but chances are 98% no. Good luck.

You just have to fill Delhi University admission application forms. Rest will depend on the cutoffs of university colleges, if your score will lie under that, you can get admission. Good luck.

No, it is not possible, if you don't have any reservations.

No, Hansraj College does't offer BCA courses. Instead, it offers only B.Sc (H) computer Science.

Yes you need to fill the registration form which are already out there on DU site.