A student from Kerala has filed a writ petition with the Delhi High Court challenging the Delhi University's (DU) admission guidelines which allow for 10 percent marks to be deducted from the best of four subjects of students belonging from boards with different marking systems, states a PTI report. Ahammed had scored 100 percent in the best of four subjects under the Kerala State Education Board (KSEB). He has alleged that DU deducted his total marks by 10 percent as the KSEB had a different marking system as compared with the Central Board of Secondary Education (CBSE). According to the report, part of the petition reads, "As per the system of evaluation followed by St Stephen's College my marks were 99.6 per cent, but Hindu College authorities calculated the percentage at 93.3 per cent while according to Hansraj College the percentage was calculated at 92.6 pc.""There is no uniform system of admission of Delhi University as there are lot of confusions and misunderstandings with regard to the calculation of cut-off marks, especially with regard to the students coming from other state boards," the petition says.