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.
Take context from the input text and decide on the accurate relationship between 'Vikram Pandit' and 'Citigroup' from the options provided.
Options: employer, owner of, product/material produced, brand