India's longest cable-stayed bridge was inaugurated by Prime Minister Narendra Modi in which of the following states?

Introduction / Context:
Cable-stayed bridges are modern engineering structures that use cables directly connected from towers to the bridge deck. India has constructed several such bridges, and some have set national records in terms of length. This question tests knowledge of recent infrastructure developments by asking in which state India's longest cable-stayed bridge, inaugurated by the Prime Minister, is located.

Given Data / Assumptions:

• The question refers to India's longest cable-stayed bridge, inaugurated by Prime Minister Narendra Modi.
• Options are Assam, Telangana, Gujarat and Karnataka.
• We assume up-to-date recognition of the bridge that currently holds the record and has been inaugurated in a high-profile event.

Concept / Approach:
Gujarat has seen the construction of major cable-stayed bridges across important rivers, and some of these projects have been highlighted as the longest cable-stayed bridges in India during their inauguration by the Prime Minister. While other states also have notable cable-stayed bridges, the specific claim of “India's longest cable-stayed bridge” in recent inaugurations has been associated with Gujarat. The approach is to connect this fact with the correct state option.

Step-by-Step Solution:
Step 1: Identify that the question is about a record-holding cable-stayed bridge inaugurated by the Prime Minister. Step 2: Recall news reports that highlighted a very long cable-stayed bridge over a major river in Gujarat as the longest of its kind in India. Step 3: Compare this with Assam, Telangana and Karnataka, which also have major bridges but are less frequently associated with this specific record. Step 4: From this, conclude that Gujarat is the state referred to in the question.

Verification / Alternative check:
Checking recent infrastructure news shows that Gujarat has been home to several flagship projects, including long cable-stayed and extradosed bridges inaugurated by the Prime Minister. Articles and GK notes frequently mention Gujarat when discussing India's longest cable-stayed bridge. Although other states like Assam or Telangana have important bridges, they are typically noted for different distinctions, confirming Gujarat as the best match.

Why Other Options Are Wrong:
Assam: Known for bridges such as Dhola–Sadiya, but that is a beam bridge and not typically cited as the longest cable-stayed bridge.

Telangana: Has major infrastructure projects, but the longest cable-stayed bridge record discussed in the question is not usually associated with this state.
Karnataka: Important bridges exist here but they do not match the description of India's longest cable-stayed bridge as per recent inaugurations.

Common Pitfalls:
Learners may confuse different types of bridges, such as beam bridges, suspension bridges and cable-stayed bridges, and may recall records like “longest bridge” without noting the structural category. Another error is relying only on regional memory without cross-checking which state actually holds the stated record. Paying attention to the term “cable-stayed” and remembering Gujarat's recent flagship projects helps avoid this confusion.

Final Answer:
Therefore, India's longest cable-stayed bridge inaugurated by the Prime Minister is located in Gujarat.