The question asks to identify the certification mark used to ensure the quality of agricultural products in India. Let's analyze the options:
- AGMARK: AGMARK is a certification mark that stands for "Agricultural Marketing." It is governed by the Directorate of Marketing and Inspection, an agency under the Ministry of Agriculture & Farmers Welfare, Government of India. AGMARK is used to certify agricultural products in India to assure their quality and standard.
- ISI Mark: The ISI mark is a certification mark for industrial products in India, not specifically for agricultural products. It is issued by the Bureau of Indian Standards (BIS).
- FPO: The FPO mark (Fruit Products Order) is a certification for processed fruit products, ensuring the product is hygienically produced. It is not specifically for agricultural goods.
- Eco Mark: This certification is for environment-friendly products, encouraging industries to reduce emissions and environmental impact. It is not specific to agricultural products.
Given this analysis, the correct answer is clearly AGMARK, as it specifically pertains to agricultural products and their quality certification.