In April 2017, Railway Minister Suresh Prabhu flagged off which new Vistadome coach train service with panoramic glass windows for tourists?

Introduction / Context:
Indian Railways has been introducing new types of coaches and trains to improve passenger experience and promote tourism. One of the most attractive innovations is the Vistadome coach, which has large glass windows and sometimes a glass roof so that passengers can enjoy scenic routes. The question tests your knowledge of a specific current affairs event from 2017, when the then Railway Minister Suresh Prabhu flagged off a Vistadome service.

Given Data / Assumptions:

- The event took place in April 2017. - The train involved a Vistadome coach with special viewing windows. - Options include different broad categories of trains: double deck, high speed, metro, and Vistadome coach train.

Concept / Approach:
This is a factual current affairs question. The key phrase is “Vistadome coach,” which is associated with tourist oriented trains on scenic routes such as the one between Visakhapatnam and Araku. The approach is to identify which option exactly names the special coach type. Since the other options refer to generic categories like high speed rail or metro train, the specific answer has to be the Vistadome coach train option.

Step-by-Step Solution:
Step 1: Note the clue words “new train” and “Vistadome coach” in the question stem. Step 2: Recall that in 2017 Indian Railways started a special Vistadome coach on a scenic route to attract more tourists and improve the travel experience. Step 3: Compare each option with the clue. “Double Deck Passenger Trains” and “High-speed rail” describe other technologies and do not highlight Vistadome features. Step 4: “Metro train” refers to urban mass rapid transit systems and is not related to Vistadome coaches used on intercity tourist routes. Step 5: Only “Vistadome coach train” explicitly matches the type of coach and is therefore the correct answer.

Verification / Alternative check:
You can verify from news archives and official press releases from Indian Railways in April 2017. Reports clearly mention that Suresh Prabhu flagged off a Vistadome coach train on a scenic route, highlighting features like wide glass windows, revolving seats, and observation lounges to promote tourism.

Why Other Options Are Wrong:
- Double Deck Passenger Trains: These are used for capacity enhancement on busy routes but are not the specific tourism focused Vistadome service mentioned in 2017. - High-speed rail: Refers to trains running at very high speeds, often on dedicated corridors. The 2017 event was not such a project. - Metro train: This is an urban rail system within cities and does not involve scenic tourist coaches on intercity routes.

Common Pitfalls:
Candidates sometimes confuse big rail technology projects, such as bullet trains or metro expansions, with tourist oriented initiatives. Another common error is to pick the most technologically advanced sounding option such as high speed rail, even when the question clearly points to a tourism and sightseeing context. Always match the key phrase in the question with the closest technical name in the options.

Final Answer:
The new tourist service flagged off by Railway Minister Suresh Prabhu in April 2017 was the Vistadome coach train service, so that option is correct.