As to whether you would manipulation "most of whom" or "most of which," both "who" and "which" are congenator pronouns. "Who" is exploited to advert to people, spell "which" is put-upon to advert to animals and things. For example, "I have twelve co-workers, most of whom are French, and I have twelve wine bottles, most of which are empty." Since "most of _" is a function word phrase, the slump utilisation would be "most of whom." The musical phrase "most of who" should probably never be put-up...

As to whether you would manipulation "most of whom" or "most of which," both "who" and "which" are congenator pronouns. "Who" is exploited to advert to people, spell "which" is put-upon to advert to animals and things. For example, "I have twelve co-workers, most of whom are French, and I have twelve wine bottles, most of which are empty." Since "most of _" is a function word phrase, the slump utilisation would be "most of whom." The musical phrase "most of who" should probably never be put-up...