In 1893, at the World Parliament of Religions held in Chicago, Swami Vivekananda began his speech with which one of the following words?

Swami Vivekananda began his historic address at the Parliament of the World's Religions in Chicago on 11 September 1893 with the iconic words 'Sisters and Brothers of America'. These opening words drew a thunderous standing ovation lasting several minutes from the audience of nearly 7,000 people, marking a defining moment in the introduction of Hindu philosophy to the Western world. Hence option (a) is correct.