Hey there

You can choose any courses in which you are comfortable as for being eligible for union Public Service Commission examination the candidate nice to only complete graduation in any specialisation. There is no specific subject which you have to take in graduation for fighting union Public Service Commission examination. The age of the candidate must be minimum 21 years.

For more: https://www.google.com/url?sa=t&source=web&rct=j&url=https://competition.careers360.com/exams/upsc-civil-services-exam/amp&ved=2ahUKEwiH8MnfpdnzAhWLxzgGHcBsDyQQFnoECAgQAQ&usg=AOvVaw0YgHjPSGbCBqWgNlDAT28h&ampcf=1