The Indian Railways on October 7, 2021, launched and operated two long-haul freight trains named ____________, to provide a very effective solution to the problem of capacity constraints in critical rail sections.

Correct option is D

The correct answer is (d) Trishul and Garuda
 The Indian Railways indeed launched and operated two long-haul freight trains named "Trishul" and "Garuda" on October 7, 2021, to address capacity constraints in critical sections.
 These trains were designed to be significantly longer than regular freight trains, allowing them to transport more cargo efficiently.
 The Indian Railways began its operations from 16 April 1853.
 Four sites of Indian Railways have been declared as “World Heritage sites” by the UNESCO. They are Darjeeling-Himalayan Railway, Nilgiri Mountain, Mumbai CST, and Kalka-Shimla Railways.