Take context from the input text and decide on the accurate relationship between 'Reliance Communications' and 'Dhirubhai Ambani' from the options provided.
Options: founded by, developer, employer, headquarters location

All group companies of ADAG (Anil Dhirubhai Ambani Group) delivered pathetic returns even after two decades for Reliance Infra, and one decade for Reliance Capital and Reliance Communications and Reliance Power.
founded by