Hey as per your demand here I am providing you details of eligibility criteria for CSE UPSC exam

Nationality
Candidate should be Indian

Age limit
A candidate must have attained the age of 21 years and must not have attained the age of 32 years

Number of attempt
General category candidates: 6
OBC category candidates = 9
SC/ST Candidates = unlimited

Qualification
Candidate should have bachelor degree from recognised university
Candidates can be of any stream

Here I am giving you list of optional subjects
Agriculture
Animal Husbandry and Veterinary Science
Anthropology
Botany
Chemistry
Civil Engineering
Commerce and Accountancy
Economics
Geography
Geology
History
Law
Management
Mathematics
Mechanical Engineering
Medical Science
Physics
Political Science and International Relations
Psychology
Public Administration
Sociology
Statistics
Zoology
Mechanical Engineering

Selection criteria
Written test
Interview