Which was the first Indian city to introduce an "electric radio cab" service based on battery operated taxis?

Introduction / Context:
Urban transport and environmental initiatives are increasingly important topics for general awareness. Electric cab projects are part of efforts to reduce air pollution and dependence on fossil fuels. This question asks you to identify the first Indian city where an organised “electric radio cab” service, using battery operated taxis, was formally launched.

Given Data / Assumptions:

• The service described is an electric radio cab fleet using battery powered vehicles.
• The question is about the first Indian city to start such a service.
• The options are Goa, Delhi, Hyderabad, and Nagpur.
• We assume the reference is to the launch of an electric cab fleet in association with a major cab operator and government support.

Concept / Approach:
In 2017, Nagpur in Maharashtra became the first Indian city to host a large scale fleet of electric taxis under a “radio cab” style service. The project involved a ride hailing company and a variety of electric vehicles including cars and buses. Knowing that Nagpur was highlighted as a pilot city for electric mobility gives you the key to this question.

Step-by-Step Solution:
Step 1: Recall which city was in the news as India's first city with an all electric taxi fleet linked to a radio cab service. Step 2: Remember that this pilot project was launched in Nagpur, supported by the central government's electric mobility vision. Step 3: Look at the options: Goa, Delhi, Hyderabad, and Nagpur. Step 4: Choose “Nagpur” because it matches the city chosen for the first electric radio cab initiative.

Verification / Alternative check:
A useful memory aid is to associate Nagpur with several “firsts” in transportation experiments, including early metro phases and electric vehicle pilots. News stories often mentioned Nagpur as India's first city with an operational fleet of electric taxis under a structured cab service.

Why Other Options Are Wrong:

• Goa: Known for tourism, but not the first city to launch this particular type of electric radio cab service.
• Delhi: A large city with many eco initiatives, but it was not the first in this context.
• Hyderabad: Also active in technology and transport projects but not the city chosen for this specific pioneering electric cab fleet.

Common Pitfalls:
Students sometimes guess Delhi or Hyderabad because these cities frequently appear in technology and transport news. Another mistake is to think of Goa because of tourism, forgetting that this was a structured electric cab pilot, not a tourist taxi experiment. Careful reading of current affairs capsules helps prevent such confusion.

Final Answer:
The first Indian city to introduce an organised electric radio cab service was Nagpur.