Which of the following milestones in William Shakespeare's life occurred in 1564? A. William Shakespeare died. B. William Shakespeare was born. C. William Shakespeare wrote his first sonnet. D. William Shakespeare wrote his first tragedy.

William Shakespeare, one of the greatly acknowledged poets and dramatists of all time. He has been titled as 'bard of Avon' and quite often characterized as the 'England's national poet' due to his remarkable contribution to English literature in particular and language in general.

As per the question, the milestone or event that occurred in Shakespeare's life in the year 1564 was that 'he was born in this very year dated 23rd of April, 1564' at 'Stratford-upon-Avon'(for which he is also characterized as 'brad of Avon'. His immense contribution to English language and literature is desirable. Thus, option B is the correct answer.