Dear Student,
Following is the chronological order of the events :
(a) Sri lanka emerged as an independent country in the year 1948.
(d) The establishment of State Reorganization Commission took place in the year 1953
(b) Act passed by the Government of Sri Lanka to recognize Sihala as the only official
language happened in the year 1956
(c)Constitutional amendment Act to create third -tier of democracy took place in the year 1992.
Regards.