My query is-At no point of application form,I was asked to choose centre preference.Just before the payment window ,Option was ther but it was not dispaying options ,it was only displaying 'select'.Plz help ASAP  

Hi Akshita,
Relax do not worry I know the last date to fill application is tomorrow. Look the preferences which are showing in the application form are of courses.
Preferences to choose courses not examination centres. The christ university has not yet given any option to choose examination centres.
Just fill the form now giving 1st preference to BA LLB and 2nd to BBA LLB. There are no option given to choose centres. Just fill the form as it is given. Do not bother about examination centres. The examination centres will be asked after filling the application form. For more clearance you can call to the official of christ university.
Do not wait for examination centres option just fill the form as it is given.
Good luck!