成绩单中"课程性质"以及“必修”、“选修”怎么翻译成英文

Question

必修、选修所属的“课程性质”这个词怎么翻译呢
在做出国成绩单，“必修”、“选修”有没有简单却不失正式的方便打到表格里翻法

Answer 1

课程性质 course character
必修 required (or obligatory)
必修课 a required (or obligatory) course
选修 elective
选修课 an elective course

Answer 2

必修课程compulsory
course或者required
course
选修课程selective
course或者elective
course
公选课：common
course或者common
required
course或者common
core
缩写这个至少我不知道怎么办

Answer 3

必修课
a required course; an obligatory course。

选修课
an elective course; a selective course; a selected course

Answer 4

course requirement: compulsary/elective

Answer 5

compulsive subject/ optional subject