The correct answer is: A. Humsafar, Tejas and Uday.
Humsafar Express is a superfast train service introduced by Indian Railways in 2013. It is a fully air-conditioned train with modern amenities like GPS-based passenger information system, CCTV cameras, and bio-toilets. The train runs on selected routes between major cities in India.
Tejas Express is a semi-high speed train service introduced by Indian Railways in 2017. It is a fully air-conditioned train with modern amenities like GPS-based passenger information system, CCTV cameras, and bio-toilets. The train runs on selected routes between major cities in India at a speed of up to 160 km/h.
Uday Express is a luxury train service introduced by Indian Railways in 2016. It is a fully air-conditioned train with modern amenities like GPS-based passenger information system, CCTV cameras, and bio-toilets. The train runs on selected routes between major cities in India.
The other options are incorrect because they do not include all three of the trains that were launched to improve the quality of travel for reserved passengers.