Which among the following railway zones in India was the first to achieve complete (100%) electrification of all its broad-gauge routes?

The correct option is Western Railway.

Key Details:
- Western Railway (WR): Headquartered at Churchgate in Mumbai, Maharashtra, Western Railway is one of the major zones of Indian Railways.
- Among the choices provided, Western Railway achieved 100% electrification of all its broad-gauge (BG) routes across its divisions (Mumbai, Vadodara, Ahmedabad, Ratlam, Rajkot, and Bhavnagar).
- Complete electrification of broad-gauge routes significantly cuts down operational costs by eliminating diesel locomotives, improves hauling capacity and average train speeds, and lowers carbon emissions in alignment with Indian Railways' vision for green and clean transit.

Overview of Electrification Drive:
- Indian Railways has undertaken a massive mission-mode initiative to fully electrify its broad-gauge rail network across the entire nation to reduce reliance on imported fossil fuels and transition towards net-zero carbon emissions.