1. In all these writ petitions, the petitioners have completed their Higher Secondary Examinations conducted by the respondents 1 to 3 in March, 2010 and have sought admission to the MBBS Degree Course in the Government Medical Colleges in the State of Tamil Nadu for the academic year 2010-2011.

2.1. The grievance of the petitioners in these cases is relating to Question No.32 in Part-II, Section-C of Bio Zoology Subject in the Higher Secondary Examination carrying five marks. The said question in English was as follows:

"32. Describe the Karyotyping of Human Chromosomes." In Tamil version, the question was as follows: "32. TAMIL"

2.2. In Section-C there were five questions, namely Question Nos.29 to 33, out of which the candidate should answer any three questions. Out of the three questions, Question No.31 is a compulsory question and therefore, out of the remaining four questions, namely Question Nos.29, 30, 32 and 33, which are optional, the candidate has to answer two questions. Therefore, Question No.32 is optional.

2.3. The key answer for the said question prepared by the second respondent/Board through experts is as follows:

32 Karyotyping of Human Chromosomes