Who were the main figures discussed in the provided text, and what key contributions or facts are associated with them?

Swami Vivekananda's opening words at the Parliament of the World's Religions in Chicago were "Sisters and Brothers of America," which received a standing ovation. C) 'Sisters' and 'Brothers' of America

Swami Vivekananda's original name was Narendranath Datta. A) Narendranath Datta

Swami Vivekananda's core message in his Chicago speech promoted universal acceptance, tolerance, and the unity of all religions, which aligns with unity and compassion. C) Unity and Compassion

The line "The best poets wait for words" is from Nissim Ezekiel's poem 'Poet-Lover and Birdwatcher'. B) Ezekiel's 'Poet-Lover and Birdwatcher'

Rabindranath Tagore won the Nobel Prize in Literature in 1913 for his profoundly sensitive, fresh, and beautiful verse, by which, with consummate skill, he made his poetic thought, expressed in his own English words, a part of the literature of the West. A) 1913

The word 'Gitanjali' is a Bengali word that translates to "Song Offerings" or "a hand-full of songs." D) Songs - offerings