If you cannot find a clean PDF for Minna no Nihongo N4, use these digital tools to generate an answer check:
A comprehensive answer key for the N4 level can be viewed on Scribd - Minna no Nihongo N4 Answer Key Chapter-Specific Practice: minna no nihongo n4 renshuu b answers pdf
: Specifically covers answers for Practice B in the second elementary volume (Lessons 26–50). Migii - N4 PDF Collection If you cannot find a clean PDF for