Answer:
Replacements or substitutes for all purpose flour are:
1 cup + 2 tbsp sifted cake flour = 1 cup sifted all-purpose flour;
1 cup minus 2 tbsp unsifted flour = 1 cup sifted all-purpose flour;
1 1/2 cups breadcrumbs = 1 cup sifted all-purpose flour;
3/4 cup whole wheat flour or bran flour + 1/2 cup all purpose flour;
1 cup rye or rice flour; 1/4 cup soybean flour + 3/4 cup all-purpose flour