Hello Aspirant,

The degree can be obtained in any stream recognised by University Grants Commission (UGC) to apply for UPSC Exam.

UPSC civil services examination needs a complete hold over General Studies papers which are classified under four parts, GS I, GS II, GS III and  GS IV. Each of the GS papers have different subjects within them. Basically, these GS subjects are the papers of Economics, History, Geography, Biology, Physics, Chemistry, Environmental Science, Biodiversity, etc.

You can check the exam pattern & syllabus of the exam with the given below link.

https://competition.careers360.com/articles/upsc-civil-services-exam-pattern-syllabus

In case, You have any other query then let us know.

Good Luck!