The world’s fastest bullet train that is tested by Japan recently is ______?

1) ALFA-X
2) Renfe AVE
3) Korail KTX
4) Maglev

Explanation:
Japan has begun testing the ALFA-X version of its fastest-ever Shinkansen bullet train that could reach 400 km per hour (249 mph). The bullet train ALFA-X (Advanced Labs for Frontline Activity in Rail Experimentation) is scheduled to start its service in 2030, when, rail company JR East would operate it at 360 kilometres per hour (224 mph). This speed will make it 10 kph faster than China’s Fuxing Hao, which links Beijing and Shanghai and operates at the same top speed. This would make ALFA-X, the world’s fastest bullet train. The ALFA-X’s futuristic design features 10 cars and a sleek pointed nose.The bullet train will be tested (after midnight, when the line is quiet) twice a week on the line between Sendai and Aomori, 2 Japanese cities, which are 280 kilometres apart.