Daily Quiz: On world-famous tunnels

1 / 5 | Name the longest rail tunnel in the world which is also the first flat route through the Swiss Alps?

2 / 5 | Name the railway system connection the U.K. and France which has the world’s longest undersea segment?

3 / 5 | Name the under-construction tunnel in India which is slated to be the highest in the world once completed?

4 / 5 | Name the 27 km long structure, which is technically a ring and not intended for transportation, that runs under the France-Switzerland border?

Answer : The large hadron collider

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5 / 5 | What is the significance of the tunnel passing through the Appalachian Mountains of southwest Virginia in the U.S.?