Which line was first converted to broad gauge as a part of Project Unigauge?

Which line was first converted to broad gauge as a part of Project Unigauge? Correct Answer Guwahati to Lumding

On July 3 1992, the Prime Minister of India, P.V. NarsimhaRao launched the conversion of Guwahati to Lumding rail line. This marked the inauguration of Project Unigauge in India. This line conversion was eventually completed in January 1994.
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