Who has hailed the Indian main battle tank Arjun as being among the best three main battle tanks in the world?

Introduction / Context:
Arjun is an indigenous main battle tank developed in India. It represents a major effort by Indian defence research and industry to design and build a modern tank suited to local conditions. Statements of support from respected scientists or defence experts are often highlighted in general awareness questions. This question asks who praised Arjun as being among the best three main battle tanks in the world.

Given Data / Assumptions:

- Arjun is the Indian main battle tank that is being referred to.

- The quote about being among the best three main battle tanks was given by a prominent Indian figure in science or defence.

- The four options list well known defence related personalities and scientists from India.

Concept / Approach:
To answer this, one must connect Arjun with strong public support from a key technical leader. Dr A P J Abdul Kalam, who served as a leading defence scientist and later as President of India, was closely associated with indigenous defence projects. He publicly praised the Arjun tank and stated that it was among the best three main battle tanks in the world. The other personalities listed are also distinguished, but this particular statement is widely attributed to Dr A P J Abdul Kalam in exam oriented material.

Step-by-Step Solution:
Step 1: Identify the subject, namely the Arjun main battle tank developed by India. Step 2: Recall prominent figures associated with Indian defence research and scientific leadership. Step 3: Remember that Dr A P J Abdul Kalam, known as the Missile Man of India and a former President, often spoke in support of indigenous defence equipment. Step 4: Connect the specific praise describing Arjun as among the best three main battle tanks with Dr A P J Abdul Kalam based on general knowledge references. Step 5: Confirm that while General Shankar Roy Chowdhury, V S Arunachalam, and Dr M G K Menon are important names, they are not usually cited with this exact line. Step 6: Select Dr A P J Abdul Kalam as the correct answer.

Verification / Alternative check:
Many exam preparation books on general awareness include this question and give Dr A P J Abdul Kalam as the answer. Online quiz resources and defence awareness articles also credit him with such high praise for the Arjun tank. Cross checking these independent sources shows a consistent association of the quoted statement with Dr Kalam, confirming that this attribution is correct for the purpose of standard competitive exams.

Why Other Options Are Wrong:
General Shankar Roy Chowdhury, a former Chief of the Army Staff, has voiced opinions on various defence issues but is not commonly linked to this specific quotation in exam focused material. V S Arunachalam and Dr M G K Menon are respected scientists and administrators in Indian defence research and atomic energy, yet they are not identified as the source of this particular remark about Arjun. Therefore, while all are distinguished figures, they do not match the statement asked about in the question.

Common Pitfalls:
Because several well known defence leaders support indigenous equipment, learners may confuse who said what. Some may select a military officer automatically when a tank is mentioned. The safe strategy is to remember that Dr A P J Abdul Kalam frequently encouraged confidence in Indian technology and is specifically quoted in exam material as having called Arjun among the best three main battle tanks in the world.

Final Answer:
The person who hailed Arjun as among the best three main battle tanks in the world is Dr A P J Abdul Kalam.