Which stream should I choose after Class 10 to become an IAS officer?

You can choose any stream—Arts/Humanities, Commerce, or Science—to become an IAS officer. The Union Public Service Commission (UPSC) only requires a graduation degree in any discipline. While the Arts/Humanities stream has subjects that overlap significantly with the exam's General Studies syllabus, success ultimately depends on your interest, dedication, and performance in the Civil Services Examination, not your academic stream.