Question: In between Huadu District and Xiantao which one covers an area of 2538 square km.?
Context: Jinshui District (Chinese: 金水区; Pinyin: Jīnshuǐ Qū) is a district in Zhengzhou city, Henan Province.  The District is 242.2 square km, in which the urban area is 58 square km.  The total population is 1.01 million, in which the urban population is 865 thousand. Line 9 of the Guangzhou Metro () or Huadu Line () is expected to run across Huadu District.  It will start at Fei'eling and end at Gaozeng, interchanging with Line 3 at Gaozeng.  The total length will be 20.1 km with 11 stations.  Line 9's color is peppermint green.  Line 9 is expected to be opened to operation on 2017.  Line 9 was originally planned to be extended further northwest into neighboring Qingyuan city but was canceled due the project's poor business case.  Instead the Guangzhou–Qingyuan Intercity Railway started construction and will provide a quicker connection between the two cities. The Klang District (Malay: "Daerah Klang" ) is an administrative district in Selangor, Malaysia.  The district consists of two sub-districts (Malay: "mukim" ) namely Klang and Kapar that covers 626.78 square km of land with 53.75 km of coastline.  Its principal city is Klang, though the district does not administer the city.  The city of Shah Alam is partly within Klang District.  The Klang River flows through the Klang district and end near Port Klang.  Klang district is situated near the Straits Of Malacca in the Selangor state.  Klang district has many islands such as Pulau Klang, Pulau Indah, Pulau Chet Mat Zin, Pulau Ketam, Pulau Tengah, Pulau Rusa, Pulau Selat Kering and Pulau Pintu Gedong. The Ismenius Lacus quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey (USGS) Astrogeology Research Program.  The quadrangle is located in the northwestern portion of Mars’ eastern hemisphere and covers 0° to 60° east longitude (300° to 360° west longitude) and 30° to 65° north latitude.  The quadrangle uses a Lambert conformal conic projection at a nominal scale of 1:5,000,000 (1:5M).  The Ismenius Lacus quadrangle is also referred to as MC-5 (Mars Chart-5).  The southern and northern borders of the Ismenius Lacus quadrangle are approximately 3065 km and 1500 km wide, respectively.  The north-to-south distance is about 2050 km (slightly less than the length of Greenland).  The quadrangle covers an approximate area of 4.9 million square km, or a little over 3% of Mars’ surface area.  The Ismenius Lacus quadrangle contains parts of Acidalia Planitia, Arabia Terra, Vastitas Borealis, and Terra Sabaea. Huadu District is a district of the sub-provincial city of Guangzhou, in Guangdong, China.  It is located in the far northern suburbs of the city. Mulberry Park (Guangdong), located in Huadu District of Guangzhou City, Guangdong Province, China, is a tourist attraction which was set up in 2007 with registered capital of one million yuan.  It is an exclusively-invested enterprise set and managed by The Institute of Guangdong Academy of Agricultural Sciences, which focuses on agricultural processing, sericulture, and mulberry culture.  And it is the first new ecotourism demonstration base in China. Marungapuri block and Marungapuri Taluk is a revenue block and Taluk in the Tiruchirappalli district of Tamil Nadu, India.  It has a total of 49 panchayat villages.Marungapuri taluk will have Marungapuri, Valanadu, and Thuvarankurichi firkas as its jurisdictional areas.  The Taluk Office is functioning temporarily at T.Kallupatti, about three km away from Marungapuri, on the Tiruchi-Madurai National Highway.Marungapuri taluk will cater to a population of about 1.41 lakh in an area of about 445 square km and the Manapparai taluk to about 2.63 lakh in 544.36 square km.  The Taluk Comes Under The Jurisdiction of Srirangam Revenue Divisional Office (RDO). According to census 2011, it has a population of 48468 in an area of 36.3 square km.  With a population density of 1332.5 per square km, it is one of the densely populated panchayat in Kerala. One of the great of person Mr.Balakrishna lived in this area, he is very genius and scholar The National Park of Upper Niger is a recently gazetted national park in Guinea in northwestern Africa.  The park covers around 6000 square km of in the north-eastern area of the country, of which 600 square km comprise the core area.  The park protects important tracts of forest and savannah, and is considered a conservation priority for West Africa as a whole. Xiantao () is a sub-prefecture-level city in east of Hubei province, People's Republic of China.  Located at the Jianghan Plain in the middle of Hubei province and spanning 112°55'—113°49' east longitude and 30°04'—30°32' north latitude, Xiantao City covers an area of 2538 square km.  With subtropical monsoonal climate, it features distinctive four seasons, adequate rainfall, enough sunshine and warm climate.
Answer: Xiantao City