The question asks to identify the state that recently explored the possibility of constructing an artificial inland port connected to the sea by a long navigational channel. This is a factual question related to current affairs and infrastructure development in India.
D) Rajasthan — Rajasthan, being a landlocked state, has explored the possibility of constructing an artificial inland port to facilitate trade and connect to the sea. The proposed project involved connecting an inland port in Jalore district to the Arabian Sea via a navigational channel through Gujarat, thereby providing the state with a direct sea link for cargo movement. This was a significant development discussed around the time the question was framed (2016).
The question asks to identify the train route that reaches a maximum altitude of 5072 m. This requires knowledge of major high-altitude railway lines globally.
Correct Option: B) Xining to Lhasa is the route of the Qinghai-Tibet Railway, which reaches its highest point at Tanggula Pass, an elevation of 5072 m.
The question asks to identify the longest railway system connecting St. Petersburg. This requires knowledge of major railway lines, particularly those associated with Russia and their geographical extent.
C) The trans - Siberian — The Trans-Siberian Railway is indeed one of the longest railway lines in the world, stretching from Moscow (with connections to St. Petersburg) to Vladivostok on the Pacific coast. It is the correct answer as it is the longest railway system connected to St. Petersburg.
The question asks to identify the medium that facilitates faster communication among the given options. We need to evaluate each option based on its speed of information transmission.
B) Satellite — Satellite communication involves transmitting signals through space, which travel at the speed of light. This allows for near-instantaneous communication over vast distances, making it the fastest medium among the choices for facilitating widespread and long-distance communication.
The question asks to identify the type of road constructed underground. We need to evaluate each option based on its common definition and construction method.
Correct Option: A) Sub way is a type of road or passage constructed under the ground, often in the form of tunnels for vehicles or pedestrians.
The question asks to identify the vehicle that does not pollute the environment. This requires understanding the basic operational principles and emissions of different types of vehicles.
Correct Option: A) An electric vehicle does not produce tailpipe emissions, meaning it does not directly pollute the environment during operation. While the production of electricity to charge its batteries might involve pollution depending on the source (e.g., coal-fired power plants), the vehicle itself is considered non-polluting at the point of use.