Explanation:

- Option 1: The Second Five Year Plan is associated with the Mahalanobis model, focusing on industrialization but not known as the "Gadgil Yojana."

- Option 2: The Third Five Year Plan is referred to as the "Gadgil Yojana." It focused on agriculture and aimed to make India self-reliant.

- Option 3: The Fourth Five Year Plan emphasized growth with stability but is not called the "Gadgil Yojana."

- Option 4: The Fifth Five Year Plan focused on poverty alleviation and self-reliance, unrelated to the Gadgil nomenclature.