Multiple choice Which gauge out of the following is not an integral part of Indian Railways? Narrow gauge Metre gauge Broad gauge Standard gauge Reveal answer Fill a bubble to check yourself D Correct answer Explanation Indian Railways uses three gauges: Broad Gauge (1676 mm), Metre Gauge (1000 mm), and Narrow Gauge (762 mm or 610 mm). Standard Gauge (1435 mm) is NOT used in the Indian railway network.