Last week, Citigroup Inc's ( C.N ) Chief Executive Vikram Pandit said that he, Chairman Win Bischoff, and senior adviser Robert Rubin would not receive bonuses for 2008.
Refer to the input text as context and select the correct relationship between 'Vikram Pandit' and 'Citigroup' from the available options.
Options: product/material produced, employer, owner of, brand