Analyze the relationship between 'Vodafone India' and 'MUMBAI' within the context of the input sentence.
Options: employer, product/material produced, owner of, headquarters location

MUMBAI (Reuters) - Leading mobile phone network operators Bharti Airtel Ltd and Vodafone India are among the 11 companies selected by the Reserve Bank of India (RBI) to help set up "payments banks", aimed at granting millions of citizens access to basic banking.
headquarters location