The world’s longest rail tunnel

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the world’s longest railway tunnel,
Gotthard is built in which of the following country?
(a) Switzerland (b) Spain
(c) Russia (d) France
Ans: (a)
Related facts:
 On 29 May 2016 the final phase of operational testing of world’s longest and deepest
railroad tunnel “Gotthard Base Tunnel” has concluded.
 The 57-kilometer (35-mile) two-single track Gotthard Base Tunnel is one of the main
railroads of Alps.
 It will connect the northern and southern Europe.
 It is officially opened on June 1, 2016 but its full service is expected to start in
December, 2016.
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