Natwar Thakkar was popularly known by which of the following titles in India?

Introduction / Context:
Natwar Thakkar was a noted social worker who devoted his life to voluntary service and national integration in the north eastern region of India, especially in Nagaland. Because of his simple living, non violent approach, and constant work for peace, many people began to compare him with Mahatma Gandhi. This question checks whether the learner knows the popular title by which he was widely remembered in public life and in competitive examination material.

Given Data / Assumptions:

• Natwar Thakkar was a Gandhian social worker.
• He worked for many years in Nagaland among local communities.
• He promoted non violence, rural development, and national integration.
• He earned a nickname that linked him with Gandhi and Nagaland.

Concept / Approach:
To answer this general knowledge question correctly, we must recall important epithets or popular titles associated with famous personalities. Many Indian social reformers are given such titles based on the region where they worked and the ideals they followed. Since Natwar Thakkar spent most of his life serving the people of Nagaland with Gandhian values, the correct title clearly connects Gandhi with Nagaland. The wrong options use other regions or more generic words and therefore do not match the specific historical usage that appears in books and articles about him.

Step-by-Step Solution:
Step 1: Read each option carefully and note the region or phrase linked with Gandhi. Step 2: Recall where Natwar Thakkar worked and became famous. He settled in Nagaland and did community work there. Step 3: Connect his Gandhian style of life and service with his work in Nagaland. Step 4: The commonly used expression in newspapers and reference books is "Nagaland Gandhi", meaning a Gandhi like figure of Nagaland. Step 5: Therefore, select the option that exactly matches this well known title.

Verification / Alternative check:
An alternative way to verify is to recall that during obituaries and tributes after his death, many headlines referred to him as Nagaland Gandhi, highlighting that he brought Gandhian ideas to the north eastern hill state. No other region is normally attached to his name. You may cross check this by looking at standard competitive exam guides on Indian personalities, where his name is usually listed with this specific epithet. Since competitive exams follow established reference material, that confirms the correctness of the answer.

Why Other Options Are Wrong:
Manipur Gandhi is incorrect because Thakkar did not mainly work in Manipur and is not described that way in reference books. Modern day Gandhi is a very broad phrase and does not indicate the region that is central to his story. Nagaland Iron man is wrong because the expression Iron man is usually associated with strong political leadership and not with his gentle style of social work. Gandhi of the north east is close in meaning but the specific and widely used title in the question context is Nagaland Gandhi, so that remains the best choice.

Common Pitfalls:
Students sometimes mark a broad sounding title that looks attractive, such as Modern day Gandhi, without checking whether it is actually used for that person in standard sources. Another common error is to confuse north eastern states and select Manipur Gandhi or another regional guess. Always connect the title to the exact state or region where the person lived and worked for a long period. Developing a small mental list of such one line facts on personalities can greatly improve performance in general knowledge sections.

Final Answer:
The correct title by which Natwar Thakkar was popularly known is Nagaland Gandhi.