Explanation: Jharkhand is a state located in the eastern part of India, known for its rich mineral resources and diverse tribal culture. The state was formed on November 15, 2000, as the 28th state of India, carved out of the southern part of Bihar. The capital city of Jharkhand is Ranchi, which is a significant administrative, commercial, and educational center.
Ranchi is situated in the Chota Nagpur Plateau, a region known for its hilly terrain and dense forests. The city is often referred to as the "City of Waterfalls" due to the numerous waterfalls in and around the city, such as Hundru Falls, Jonha Falls, and Dassam Falls. Ranchi is also known for its lakes, including the picturesque Rock Garden and the Oraon tribal village of Khunti.
The city of Ranchi is an important educational hub, with several universities and colleges, including Ranchi University, Vinoba Bhave University, and Birsa Agricultural University. It is also a significant industrial center, with industries such as steel, aluminum, and cement.
Understanding the capital cities of Indian states is crucial for geography and general knowledge, especially for students preparing for competitive examinations such as the UPSC, SSC, and state-level competitive exams. It is important to remember that Ranchi is the capital of Jharkhand and not to confuse it with other cities in the region or with cities from other states or countries.
In summary, Ranchi is the correct answer as it is the capital city of Jharkhand, a state in eastern India. The other options, Lucknow, Portugal, and Lisbon, are incorrect as they are either the capital of another state, a country, or a city in a different continent.