The correct answer is option 2, which states that the significance of the expeditions led by Malik Kafur in South India between 1309 and 1311 includes the following:
1. They reflected a high degree of boldness and spirit of adventure on the part of the Delhi rulers: These campaigns demonstrated the courage and adventurous nature of the rulers in Delhi who authorized and supported these expeditions.
2. The invaders returned to Delhi with untold wealth: The campaigns led by Malik Kafur resulted in the accumulation of immense wealth for the Delhi rulers. The Indian kingdoms in South India were prosperous, and their wealth was looted and brought back to Delhi.
3. They provided fresh geographical knowledge: It is not mentioned that these campaigns directly provided any new geographical knowledge. Therefore, option 3 is incorrect.
4. Ala-ud-din promoted Malik Kafur to the rank of Malik` naib or Vice-Regent of the Empire: The success of the expeditions earned Malik Kafur the promotion to the rank of Vice-Regent of the Empire, showing the appreciation of his achievements by the Delhi rulers.
To summarize, the expeditions led by Malik Kafur in South India were significant due to the boldness and spirit of adventure demonstrated