The question is asking who translated 'Gitanjali' written by Rabindranath Tagore. The four options provided as answers are 'W. B. Yeats', 'Robert Frost', 'John Keats' and 'Rudyard Kipling'. The correct answer to this question is 'W.B. Yeats'. This means that W.B. Yeats is the person who translated the book 'Gitanjali' written by Rabindranath Tagore.