For the topping, mix 1/4 cup of the sugar, the flour, cinnamon and nutmeg. Cut in butter or margarine til mixture resembles coarse crumbs. Set topping aside.
Preheat oven to 400. In a bowl, stir together biscuit mix and remaining 1/4 cup sugar. Make a well in the center. In another bowl, mix beaten egg, orange juice and cooking oil. Add egg mixture to dry ingredients. Stir just til moistened. Stir in marmalade and pecans.
Grease muffin pan or line with paper bake cups; fill cups 2/3 full. Sprinkle topping over each. Bake about 20 minutes or til golden. Makes 12