Who among the following has authored the book "Spare"?

1. A

   Prince Harry

   Prince Harry claims authorship of the memoir titled "Spare". This option is the key because the highly publicized autobiographical book released in early 2023 was written by Prince Harry, Duke of Sussex, detailing his life experiences, struggles within the royal family, and departure from official duties.

2. B

   Prince Williams

   Prince Williams claims authorship of the book "Spare". This option is incorrect as Prince William is the elder brother of Prince Harry and the current Prince of Wales, and he did not write this memoir.

3. C

   Prince Phillip

   Prince Phillip claims authorship of the book "Spare". This option is incorrect because Prince Philip was the Duke of Edinburgh and the grandfather of Prince Harry, who passed away in 2021 long before this book was published.

4. D

   King Charles

   King Charles claims authorship of the book "Spare". This option is incorrect as King Charles III is the father of Prince Harry and the reigning monarch of the United Kingdom, not the author of this particular autobiographical expose.

Summary. Official key is (a) Prince Harry. The question asks for the author of the controversial and widely read memoir "Spare" published in January 2023. Options (b), (c), and (d) name other prominent members of the British royal family who have no authorship connection to this specific title. Prince Harry wrote the book to share his personal perspective on growing up royal and his subsequent distancing from the institution. Therefore, option (a) is the only correct choice among the given alternatives.