Answer- B
China was one of the earliest countries in the world to adopt hydrogen-powered trains, having launched its first hydrogen fuel cell tram line in Foshan City, Guangdong Province in September 2020. As for urban trains, China has been operating various types of urban trains, including high-speed trains and maglev trains, for many years. Meanwhile, Germany launched its first hydrogen-powered trains in September 2018 and has been a pioneer in this technology.