Which of the following is non-Grade A (manufacturing grade) dairy product?

• A. Yogurt
• B. Butter
• C. Cottage cheese
• D. Sour cream

Answer: (B)

Grade A standards apply to dairy products intended for direct consumer use and require strict sanitary and quality criteria. Manufacturing grade (non-Grade A) covers products used for further processing as ingredients, with looser specs since they will undergo additional handling. Yogurt, cottage cheese, and sour cream are typically produced and sold as Grade A consumer products, meeting those strict requirements. Butter is generally categorized as manufacturing-grade in many regulatory schemes, being used widely as an ingredient in other foods and not always subject to the same Grade A criteria. So, butter is the non-Grade A dairy product in this context.