Verification of ca final exam paper

 I am a CA Final student who appeared for May 2016 examination. Recently the Institute of Chartered Accountants of India declared the results and I really appreciate the evaluation done by the respective examiner. While scoring 496/800 in my examination, I received exemption in 6 subjects out of 8. But I failed Group 2 because I received a score of 30/100 in Information System Control and Audit (ISCA). My exam, on the contrary; went well and thus, I was expecting a lot better than what I actually ended up getting. what can be done apart from applying for reverification ?