Final answer:
The correct answer is option a. Princess Betsy in 'Anna Karenina' serves tea from a Russian samovar, a traditional silver water heating urn used for making tea.
Step-by-step explanation:
In Leo Tolstoy's novel Anna Karenina, Princess Betsy would have served tea from a samovar, which is a traditional Russian silver urn used for boiling water and making tea. This item is deeply ingrained in Russian culture and would have been a common household item in the aristocracy during the time period in which Anna Karenina is set.
The other options listed, matryoshka, balalaika, and troika, are also Russian in origin but do not serve the purpose of tea preparation. A matryoshka is a set of wooden nesting dolls, a balalaika is a stringed musical instrument, and a troika refers to a group of three or a traditional Russian sleigh pulled by three horses.