Explanation:

- G.S. Ghurye: He was a prominent Indian sociologist, known for his work on caste and tribes. However, he was often critical of the policy of isolating tribes. He did not propose the idea of 'National Parks' for tribal development.

- D.N. Majumdar: An influential anthropologist, he worked on tribal issues but did not advocate the National Park model for tribal development.

- N.K. Bose: He was concerned with cultural integration of tribals, but not specifically associated with the National Park suggestion either.

- Verrier Elwin: He suggested the idea of creating ‘National Parks’ for tribes, where their traditional ways could be protected and kept undisturbed by outside influences. This model aimed to preserve their cultures and autonomy.

Correct Answer: Option 4 - Verrier Elwin.