hey,

entrance exam will comprises on aptitude test. daily study and practice will make you strong in numerical questions. follow the below link to know about syllabus:

https://bschool.careers360.com/articles/christ-university-bba

follow the book of rs agarwal for practice numerical, quantitative aptitude, data interpretation , logical and verbal reasoning. for current affairs follow bankers adda magazine. you can also download it from internet. and for english question follow any good grammar books and previous papers of christ university.

hope you may understand.