If you scored 49% in class 12 and belong to the ST category. You may still be eligible for BCA admission at GGU (Guru Ghasidas university). GGU follows relaxed eligibility criteria for reserved categories like ST. While the general requirement is around 50% reserved category candidates often get relaxation of 5% or more depending on University norms.

You have a fair chance but make sure to check the official BCA eligibility criteria on the GGU website or admission brochure for the current year. Also, If admissions are based on CUET or another entrance test you will need to meet the cutoff accordingly