Which course should I opt for in PG after completing UG in footwear technology (marketing and merchandising) from FDDI?

You can opt for MBA - Fashion Merchandising, MBA FMRM, Masters of Fashion management offered by NIFT / FDDI / NID (Inter Disciplinary design- Retail).

After doing UG in footwear design, you should go for marketing. Those have better scope than merchandising.

Please tell us about your interest, so that we can guide you better. If you are interested in footwear design then you may pursue your Masters in the same as well.