Why was the name of Kuber Singh, a 17-year-old student of G.D. Goenka World School, in the news on 20th January, 2009?

• A. He was declared as the winner of the Sanjay Chopra Award
• B. He broke the record for fastest memorising of a 9 digit number
• C. He witnessed the Swearing-in-Ceremony of President Barack Obama of USA, as an official invitee
• D. He solved the crossword puzzle of the famous USA magazine