Northern Railway zone has its headquarters in New Delhi and covers the northern part of India.

Indian Railways was established in 1853 with the first train service between Mumbai and Thane.

Ashwini Vaishnaw is the Railway Minister of India as of 2024.

As of 2024, India has 18 railway zones after the creation of new zones in recent years.

This is a straightforward geographical/factual question about India's railways. The answer requires knowledge of major railway routes and their lengths.

Step 1: Understand what the question asks

The question seeks the longest railway line in India. We need to distinguish between a train route and railway administrative zones.

Step 2: Analyze the options

- (A) Dibrugarh–Kanyakumari Vivek Express: This is a train service (not a railway line itself), but it operates on the longest railway route in India, spanning approximately 4,233 km from Assam (northeast) to Kerala (southwest).

- (B) South Western Railway: This is a railway zone/administrative division, not a specific line.

- (C) Central Railway: This is also a railway zone, not a specific line.

- (D) Northern Railway: This is a railway zone, not a specific line.

Step 3: Identify the actual longest route

The Dibrugarh–Kanyakumari route is the longest continuous railway route in India, connecting the northeastern region to the southern tip of the country. This train service covers the maximum distance among all Indian railway routes.

Step 4: Eliminate confusion

Options B, C, and D refer to railway zones (administrative regions), not actual railway lines or routes. The question specifically asks for the longest "railway line," which refers to a specific route.

Answer: The Dibrugarh–Kanyakumari Vivek Express route is the longest railway line in India at approximately 4,233 km. (Option A)

The first Vande Bharat Express operates between Delhi and Varanasi.

Vande Bharat Express trains have a maximum operational speed of 160 km/h.

South Eastern Railway covers the maximum geographical area among all railway zones.

The broad gauge of 1676 mm is used for most Indian railway lines.

# Solution: One Nation One Ticket Portal Launch

This is a factual/current affairs question about Indian Railways' digital initiative. No calculations required—direct factual recall.

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## Context

Indian Railways has been modernizing its ticketing and travel systems to provide seamless, integrated passenger experiences across multiple modes of transport. The 'One Nation One Ticket' portal is part of this digital transformation initiative.

## Key Information

One Nation One Ticket is an integrated ticketing platform launched by Indian Railways to allow passengers to book tickets across multiple transport modes (rail, metro, bus, air) through a single portal, simplifying inter-modal travel throughout India.

The portal was officially introduced in August 2024, representing a significant step toward unified mobility solutions in the country.

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## Why Other Options Are Incorrect

- (A) 2018: Early phase of Railway digitization, but not the launch of this specific portal

- (B) 2019: Continued digital expansion, but predates this initiative

- (D) 2021: Other railway apps and services were launched around this time, but not this particular portal

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Answer: August 2024 (Option C)

This recent initiative reflects Indian Railways' commitment to customer-centric digital innovation and seamless multi-modal transportation integration.