Where is the National Institute of Jute and Allied Fibre Technology located in India?

Introduction / Context:
This question focuses on an important specialised institute related to jute and allied fibres. India is one of the leading producers of jute, often called the "golden fibre", and several research and training institutes support this sector. The National Institute of Jute and Allied Fibre Technology plays a significant role in jute technology, textile engineering and product development.

Given Data / Assumptions:
- The institute named is the National Institute of Jute and Allied Fibre Technology.
- We are asked to identify the Indian state in which it is situated.
- Options include Telangana, Andhra Pradesh, West Bengal, Haryana and Assam, which are spread across different regions.
- We assume the main campus location as the reference for the answer.

Concept / Approach:
Jute cultivation and jute industries are concentrated mainly in the eastern part of India, especially in West Bengal along the Hooghly River. Kolkata has historically been the centre of jute mills and related research institutions. The National Institute of Jute and Allied Fibre Technology is located in Kolkata, so the correct state associated with this institute is West Bengal. While states like Assam and Andhra Pradesh also grow jute to some extent, the premier national institute is situated in West Bengal.

Step-by-Step Solution:
Step 1: Recall that West Bengal is the leading state for jute cultivation and jute industries in India.Step 2: Many important jute-related institutions, boards and research centres are located in and around Kolkata.Step 3: The National Institute of Jute and Allied Fibre Technology is one such institute established in Kolkata to train engineers and technologists in jute and fibre technology.Step 4: Examine the options. Telangana and Andhra Pradesh are more associated with cotton and other crops; Haryana has limited connection to jute research.Step 5: Assam does cultivate jute but does not host this particular institute.Step 6: Therefore, select West Bengal as the state where the institute is located.

Verification / Alternative check:
Official websites and prospectuses of the institute mention its location as Kolkata, West Bengal. Many exam guides list this institute among important national-level centres and clearly link it to West Bengal in tables covering institutes and headquarters. These independent references confirm that West Bengal is the correct answer.

Why Other Options Are Wrong:
Telangana: Known more for cotton, IT and other industries; it does not host the National Institute of Jute and Allied Fibre Technology.
Andhra Pradesh: Has some jute cultivation but not the primary national jute technology institute.

Haryana: A northern agrarian and industrial state without major jute research centres.
Assam: Important for tea and some jute, but the institute in question is not located here.

Common Pitfalls:
Some candidates may guess Assam because they associate jute with the northeastern and eastern plains region, or choose Andhra Pradesh based on fibre crops. The best way to avoid mistakes is to connect jute mills and the historic jute industry with Kolkata and West Bengal, and then remember that the premier jute technology institute is also located in that state.

Final Answer:
West Bengal