Take context from the input text and decide on the accurate relationship between 'Reliance Communications' and 'MUMBAI' from the options provided.
Options: chief executive officer, headquarters location, owner of, distributed by

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