Sort the four options by their real purpose. AGMARK grades and certifies quality for domestic and export goods but is not itself a trade promotion authority. PFA and FSSAI both regulate food safety standards within the country and have nothing to do with foreign trade promotion.
APEDA, the Agricultural and Processed Food Products Export Development Authority, was created under an act of Parliament with the specific job of developing export markets for Indian agricultural and processed food products, this is literally international trade and promotion work.
\[\boxed{\text{APEDA is related to international trade and promotion}}\]