Refer to the input text as context and select the correct relationship between 'Reliance Communications' and 'MUMBAI' from the available options.
Options: distributed by, headquarters location, chief executive officer, owner of

MUMBAI (Reuters) - Mobile telecoms operator Reliance Communications Ltd will partner conglomerate Reliance Industries Ltd's telecoms unit to trade and share mobile airwaves and offer high-speed 4G services.
headquarters location