Bite the bullet and buy the official teacher's book or app.
Minna no Nihongo 2 Mondai no Kotae – Answer key specifically for the Mondai (Review) sections of the second book (Lessons 26–50). : minna no nihongo n4 renshuu b answers pdf
No. The (separate book) focuses on writing and listening. Renshuu B is inside the main textbook (Honsatsu). Do not confuse them. Bite the bullet and buy the official teacher's book or app