The correct option is D Beijing
Forbidden City is Beijing. Forbidden City , also known as the Palace Museum , and Gu Gong in Chinese, lies at the city center of Beijing, and once served as the imperial palace for 24 emperors during the Ming and Qing Dynasties.It was first built throughout 14 years during the reign of Emperor Chengzu in the Ming Dynasty.Ancient Chinese Astonomers believed that the Purple Star was in the center of heaven and the Heavenly Emperor lived in the Purple Palace. The palace for the emperor on earth was so called the Purple city. It was forbidden to enter without special permission of the emperor. Hence its name 'The Purple Forbidden City' , usually ' The Forbidden City'. Now known as the Palace Museum, it is to the north of Tiananmen Square.