Correct option is D
Indian Railways Broad Gauge (BG) standard is 1676 mm, also known as 5 ft 6 in.
Also,
1435 mm → Standard Gauge (used in many other countries)
1000 mm → Metre Gauge
1220 mm → Not a standard Indian railway gauge
Which of the following is one of the standard gauges used in Indian Railways for Broad
Gauge (BG) tracks?
Indian Railways Broad Gauge (BG) standard is 1676 mm, also known as 5 ft 6 in.
Also,
1435 mm → Standard Gauge (used in many other countries)
1000 mm → Metre Gauge
1220 mm → Not a standard Indian railway gauge