Government & Defence Entrance Exam

You can pursue graduation in any course as you have to be a graduate for appearing in the UPSC CSE examination. Else, you can pursue graduation in a course that is listed to choose for UPSC Mains exams.
The list of subjects are:
Agriculture
Animal Husbandary and Veterinary Science
Anthropology
Botany
Chemistry
Civil Engineering
Commerce and Accountancy
Economics
Electrical Engineering
Geography
Geology
History
Law
Literature of any one of the non-English languages listed above
Management
Mathematics
Mechanical Engineering
Medical Science
Philosophy
Physics
Political Science and International Relations
Psychology
Public Administration
Sociology
Statistics
Zoology.

You can choose any stream of your interest because to write UPSC exams, you have to be a graduate in any course. UPSC uptakes candidates from any course. You can choose your stream according to the optional subjects also. The list of optional subjects are:
Agriculture
Animal Husbandary and Veterinary Science
Anthropology
Botany
Chemistry
Civil Engineering
Commerce and Accountancy
Economics
Electrical Engineering
Geography
Geology
History
Law
Literature of any one of the non-English languages listed above
Management
Mathematics
Mechanical Engineering
Medical Science
Philosophy
Physics
Political Science and International Relations
Psychology
Public Administration
Sociology
Statistics
Zoology
All the best.

CGPSC is like any other public services examination which requires a lot of hard-work and determination. But before starting preparation for any civil services examination you need to have full confidence in yourself, it helps in passing the tough preparation phase. Few important tips related to the preparation of CGPSC are as follows:
SYLLABUS: You should be aware about the complete exam pattern and syllabus of CGPSC. TIME TABLE: Make yourself a time table considering all the subjects required for the preparation of CGPSC. The time table should be followed accurately and should not be too harsh to follow. BOOKS: Reference books are essential for the preparation of CGPSC exam. ONLINE/OFFLINE CLASSES: You could join either any online or offline classes for crash courses and practice series. STUDY VIDEOS: You can also watch study material videos related to the CGPSC, it helps getting deeper insights about the topics. CURRENT AFFAIRS: Make it a habit of reading newspaper and editorial daily. MOTIVATIONAL VIDEOS: Make a habit of watching some inspirational videos, it will definitely help you in boosting your confidence.
Regards.