World's largest urban area

The Pearl River Delta comprising a cluster of cities in Southern China has overtaken Tokyo as the world's largest urban area in terms of both population and land area, the World Bank said in a report on urbanization in East Asia. The Pearl River Delta, including Guangzhou, Shenzhen, Foshan and Dongguan, has 42 million inhabitants, a population larger than that of Argentina, Canada or Malaysia, said the bank.

Which of the following cities is not part of the Pearl River Delta?

A. Foshan

B. Dongguan

C. Changsha

（中國日報網英語點津 陳丹妮 編輯）