Concept:The title "Iron Man of India" is given to Sardar Vallabhbhai Patel for his leadership in integrating over 500 princely states into the Indian Union after independence.
Explanation:After India gained independence in 1947, the country faced the challenge of unifying numerous princely states. Sardar Vallabhbhai Patel, as the first Deputy Prime Minister and Home Minister, took charge of this task.
He used a mix of diplomacy, persuasion, and, when needed, the threat of military action to bring states like Hyderabad, Junagadh, and Kashmir into India.
His efforts prevented the fragmentation of the nation and built a strong, united federal structure. His role was unique and crucial for national integration.
Other leaders like B.R. Ambedkar (known for the Constitution), Bal Gangadhar Tilak (known for early freedom struggle and "Swaraj"), and Subhas Chandra Bose (known for leading the INA) made significant contributions, but they were not primarily responsible for merging princely states.
Answer:The correct option is B. Vallabhbhai Patel.