8.It was further stated that the difference between the previous scheme and the modified scheme is in respect of only one aspect, i.e., number of questions apportioned for general knowledge in the scheme already announced was 200, whereas in the revised scheme, the questions for general knowledge is 150 and for aptitude it is 50. The syllabus as well as the scheme for Group I services, i.e., preliminary examination announced in both advertisements are one and the same. The preliminary examination is meant to serve as a screening test. Under the written examination as well as interview, the marks for interview and records are restricted to 12.25% of marks as per the dicta laid down by the Supreme Court in Ashok Kumar Yadav case. In view of the change of examination, the last date for receipt of the applications was extended from 6.12.2012 to 7.1.2013. The schedule for the preliminary examination was fixed on 27.01.2013. Due to other contingencies, the Commission had decided and approved the change of preliminary examination from 27.01.2013 to 16.02.2013. This gives all candidates 40 days of preparation for writing the examination. Therefore, the petitioner's original grievance, i.e., the period prescribed was too short was removed.