The correct answer is: None of these
EMU trains do not have couplings. Couplings are used to connect two or more railway vehicles together. They are typically located at the ends of the vehicles and are designed to allow the vehicles to move together as a single unit.
EMU trains are powered by electricity and do not have engines. This means that they do not need to be connected to each other in order to move. Instead, they are connected to an overhead power line that provides them with electricity.
The lack of couplings on EMU trains has several advantages. First, it makes them lighter and more efficient. Second, it allows them to
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