With a CUET score of 636 and being in the OBC category, you're likely eligible for B.Com (Hons.) in universities like BHU, where the OBC cutoff is usually around 430 to 485. However, for Delhi University, especially top colleges like SRCC, Hindu, or Hansraj, the OBC cutoff tends to be much higher, often above 700. So getting into B.Com (Hons.) at DU this year with your score might be difficult unless cutoffs drop significantly or you're targeting less competitive DU colleges. BHU and some other central universities are a safer bet with your score.