The Students Federation of India (SFI) has demanded a comprehensive inquiry into the repeated instances of answer papers at the Kerala University. In a statement here on Sunday, SFI State president Shijukhan and secretary T.P. Bineesh said the SFI would organise a march to the university headquarters here on Monday to press for the inquiry. Revaluation of 643 answer papers of the 2012-’13 first and second year B.A. English examinations had become impossible due to disappearance of counterfoils. Earlier the answer papers of 21 candidates who had appeared for the fourth semester B.Sc. Electronics examination had also gone missing, they pointed out.– Special Correspondent