1978 (Department of Personnel and Administrative Reforms Department of Personnel A Group II No. F.7(10)DOP/A 107 1 dated 11th September, 1978) relating to sub rule (6) of Rule 25; and the Circular dated 28.4.1979 (Department of Personnel (A II) No. F.7(10) DOP/A II/77 dated 28th April, 1979) and the Notification dated 30.11.1991 (Department of Personnel & Administrative Reforms Department of Personnel A II No. F.7(10)DOP/A II/77 dated 30th November, 1991), providing guidelines for selection on the basis of merit, relating to Explanation to sub rule (11) of Rule 25, issued by the State Government, wherein it was stated as under: Circular dated 11.9.1978 "Subject Promotion to certain categories of posts to be filled in on the basis of "Merit" and "Seniority cum Merit".