• Regulatory Authority: The ISI mark (Indian Standards Institute mark) is a certification mark issued exclusively by the Bureau of Indian Standards (BIS), the national standards body of India established under the BIS Act.
• Mandatory Compliance: The ISI mark is mandatory for industrial products, packaged drinking water, milk powders, and infant food formulations sold in India to certify adherence to Indian Quality Standards (IS specifications).
• Comparison with Other Bodies:
• FSSAI: National regulatory body overseeing food safety and hygiene licensing across the food chain.
• AGMARK: Quality certification mark for agricultural commodities issued by the Directorate of Marketing and Inspection (DMI).
• ISO: International non-governmental standards organization.

Correct option: (2) BIS