Preheat oven to 400 F. Grease 14-16 muffin cups. Toss apple with lemon juice in small bowl. Stir together flour, whole wheat flour, sugar, brown sugar, baking powder and salt until well mixed. Whisk milk, egg and melted margarine. pour over flour mixture. Add apples. Gently stir just to moisten. Spoon into prepared muffin pans. Combine sugar and cinnamon. Sprinkle over dough. Bake at 400 F. for 20-25 minutes. Remove from cups. Cool on wire rack. Reheat at 325 F . for a few minutes. Mc formatting and