What is the relationship between 'Flipkart' and 'eBay' in the context of the input sentence.
Options: developer, subsidiary, founded by, currency

In a bid to encourage more sellers join their online channels, e-commerce majors including Flipkart , Snapdeal , Amazon and eBay are tying up with non-banking lenders for extending loans to those keen to sell products through these online marketplaces.
subsidiary