The longest optical fibre cable of the world is laid between

Keep practicing — related questions

• Optical fiber cable was established at _____ in 1977 for the first time in the world.
• "Optical fibre" is invented from
• The world's longest subway system, which spans more than 390 km, is in this city:
• Longest bridge in the world
• City Of Lights
• WORLD'S LONGEST BRIDGE IS IN ________
• Longest rail route in the world
• _______ is called city of light.