Yes, the candidate’s graduation degree is valid for the UPSC exam, but you need to apply for an equivalent certificate from the Association of Indian Universities (AIU). When you get your graduation degree from the US or any foreign country, get a photocopy of the US/foreign degree attested by the High Commission of India of that particular country. Send photocopies of degree, transcripts, matriculation and 10+2 certificates to the Foreign Degrees Evaluation Section at the AIU. Within a week, you will be receiving an equivalence certificate from AIU.