Ka cika wannan furcin: Littattafan da ke rukunin B da C sun samo asali ne daga juyi na X. Sun ƙunshi ƙarin littattafai na scholia. Mafi kyawun rubutu a cikin rukuni B shine abin da ake kira Codex z, wanda aka rubuta 1161/2, wanda aka rasa a cikin
Gobarar Copenhagen ta shekara ta 1728. Wasu kwafin wannan rubutun sun wanzu.