First Underground Railway:
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Chennai Central
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B'lore Majestic
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Mumbai Central
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Calcutta METRO
D
Correct answer
Explanation
The Calcutta (now Kolkata) Metro was India's first underground railway system, commencing operations in 1984. It was a pioneering infrastructure project that introduced metro rail technology to India. Other cities mentioned are major railway hubs but did not have underground metro systems before Kolkata.