context: NARA's holdings are classed into "record groups" reflecting the governmental department or agency from which they originated. Records include paper documents, microfilm, still pictures, motion pictures, and electronic media.
question: (খ) কীসের ভিত্তিতে প্রত্যেকটা রেকর্ডকে শ্রেণীবদ্ধ করা হয়?
answers: governmental department or agency