The correct answer is option 1, Ahmedabad and Mumbai. India has made a deal with Japan to introduce its first high-speed rail, also known as a bullet train, between these two cities. This deal was made to enhance connectivity and transportation infrastructure in the country.
Option 2, Pune and Mumbai, is not the correct answer. Although both cities are in close proximity to each other, the deal was specifically made for the Ahmedabad-Mumbai route.
Option 3, Ahmedabad and Delhi, is also not the correct answer. While there are plans for a high-speed rail between these two cities, the deal with Japan is focused on the Ahmedabad-Mumbai route.
Option 4, Chennai and Hyderabad, is not the correct answer either. While there have been discussions about high-speed rail projects in Southern India, the deal with Japan is for the Ahmedabad-Mumbai route and not for Chennai and Hyderabad.
In conclusion, the correct answer is option 1, Ahmedabad and Mumbai, for the introduction of India`s first high-speed rail.