The ultimate aim that every Class 12 student has is to overcome the challenge of board exams, with flying colors, for which the preparation must be complete and flawless.
There is nothing wrong in doing Outside Delhi question papers, even if you are a Delhi/Foreign student. After all, all question papers are of same pattern, and contains questions from the same syllabus that any other student in other region also studies.
Indeed, it is highly appreciated to practice and get acquainted with all Previous year question papers, irrespective of regions or sets. Do maximum amount of Previous year questions, get acquainted with all models of questions and question papers, as questions do get repeated to a great extent, irrespective of regions where it had already been asked.