Which engineering marvel in Switzerland the world's longest and deepest railway tunnel opened 10 years ago in 2016? MCQ Questions & Answers | All Govt Exams Practice
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📝 Multiple Choice Question Current-affairs-2026

Which engineering marvel in Switzerland the world's longest and deepest railway tunnel opened 10 years ago in 2016?

A Channel Tunnel
B Gotthard Base Tunnel
C Seikan Tunnel
D Brenner Base Tunnel

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