For relaxation in marks in essential qualification in recruitment of lecturer (UPSC) for SC-ST

I Hemant Kumar Meena applied for the recruitment of lecturer (civil engineering) in UPSC. Recruitment process is based on CBRT (Computer Based Recruitment Test) and interview. After selected in exam i am disqualified to appear in interview because my essential qualification which is Degree in Engineering with first class not fulfilled.My graduation percentage is 60.92 but according to My university first division is awarded above 70% or 6.5 (CGPA). The UGC (Minimum qualifications for appointment of teachers and other academic staff in universities and colleges and measures for the maintenance of standards in higher education) (4th Amendment), Regulations, 2016 prescribe 5% relaxation in minimum eligibility marks of 55% marks for candidates belonging to SC, ST and OBC categories for direct recruitment to teaching positions. The regulations are available at http://egazette.nic.in/WriteReadData/2016/170658.pdf . The Department of Personnel & Training (DOPT) has informed that in order to increase the representation of SC/ST/OBC communities in posts and services under the Central Government, various concessions/relaxations are provided in direct recruitment, apart from prescribing reservations for candidates belonging to these categories. please advise me can i challenge this disqualification in court.