Which 1968 democratic primary candidate was assassinated?

lyndon johnson
eugene mccarthy
robert kennedy
hubert humphrey

The correct option is: "Robert Kennedy"

Robert Kennedy, also known as RFK, was the Attorney General of the United States from 1961 to 1964. He was one of the younger brothers of the president of the United States, John F. Kennedy, and one of his most trusted advisers. After Eugene McCarthy was about to defeat Lyndon Johnson in the 1968 New Hampshire primary, Kennedy announced his own campaign for the presidency in a battle for control of the Democratic Party. Kennedy beat McCarthy in California's primary election but was shot moments after making his victory speech at dawn on June 5, 1968, dying on June 6. On June 9, President Johnson declared an official national day of mourning in honor of Robert Kennedy.

i think the answer is b.