What is 'o' level?

Answer 1

grade 8-10

Answer 2

The"General Certificate of Education 'Ordinary' Level Examination", otherwise known as the "GCE 'O' Level" or the "O Levels" is the examination taken by students of Secondary Education in the United Kingdom, Commonwealth countries or regions associated with the British curriculum. The "GCE 'O' Level" is a subject-based qualification usually encompasses students of Grade 8 to Grade 10.

The "GCE 'O' Level" in the United Kingdom is replaced by the "General Certificate of Secondary Education" (abbreviated "GCSE") in 1988. However, many Commonwealth countries and some British schools still retain the "GCE 'O' Level" through the examining boards of the Cambridge International Examinations (CIE), American Council for Higher Education and Edexcel International.

Note that the Singapore's "GCE 'O' Level", the "Singapore-Cambridge General Certificate of Education 'Ordinary' Level Examination" is, though based on the CIE, a collaboration of both CIE and the Ministry of Education, Singapore; resulting in a notoriously more difficult version of the "GCE 'O' Level".