∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] [inst_1 : CategoryTheory.CartesianMonoidalCategory C]
  [inst_2 : CategoryTheory.Limits.HasInitial C] (B : C) [CategoryTheory.MonoidalClosed C],
  CategoryTheory.Mono (CategoryTheory.Limits.initial.to B)