1.In all these writ petitions, the petitioners have challenged the impugned letter dated 14.1.2011 of the Registrar, Tamil Nadu Dr.M.G.R. Medical University, whereby the University, while re - introducing the award of grace marks up to a maximum of five in theory papers, has informed that the same shall be awarded only in one subject or shall be distributed among the other two or three subjects, however no grace marks shall be awarded for practical examination for all courses. The operative portion of the impugned letter, which is in effect challenged, is as follows:

"1) RE - INTRODUCTION OF AWARD OF GRACE MARKS (UP TO A MAXIMUM OF FIVE MARKS IN THEORY PAPERS FOR UNDER GRADUATE & POST GRADUATE DEGREE / DIPLOMA AND SUPER SPECIALITY DEGREE COURSES.

The awarding of grace marks upto a maximum of five marks in theory papers to the students of Under - graduate. Post graduate in Medical, Dental, Indian Medicine and Homoeopathy, Allied Health Sciences and Super Specialty courses be re - introduced from February / April 2011 examination onwards. The grace marks of five (5) shall be awarded in one subject or shall be distributed among the other two or three subjects. No Grace marks shall be aw