Hello Kushagra, 

DU college of arts only provides BFA and MFA courses. There is nothing as a bday course. For admission to BFA course you only need to have a 10+2 certificate from a recognized board and secure 50% average marks. 

Admission to this college is done on the basis of the aptitude test it conducts. HS scores is given 60% weightage while aptitude test marks is given 40% weightage. You must get 50% at least in the aptitude test for any chance of admission. 

You can find the application form here when it's made available : http://delhi.gov.in/wps/wcm/connect/Lib_Collegeofart/collegeofarts/home