Hello Anisha

You should have studied Mathematics in Class 12th to be eligible to appear for the exam.

According to the Eligibility Criteria, candidates belonging to the General Category should have an aggregate of minimum 60 percent in four papers including English, Mathematics and other two subjects from the list of elective subjects as approved by the University of Delhi. 
The list of subjects are-

Arabic,Bengali, Botany, Biology/ Biotechnology, Chemistry, Commerce/Business Studies, Computer Science/ Informatics Practices, Economics, English, French,Geography, Geology, German, Hindi Italian, LegalStudies, Mathematics, Persian, Philosophy, Physics, Psychology, Sanskrit, Sociology, Spanish, Statistics, Urdu, History, Political Science, Zoology, Home Science, Punjabi, and Accountancy.

Good Luck!