Explanation:

The Permanent Settlement, also known as the Zamindari System, was introduced by Lord Cornwallis in 1793. It aimed to simplify the collection of land revenue by making Zamindars, the intermediaries between the British government and the peasants, responsible for tax collection.

Statement 1 is correct. The Permanent Settlement fixed the land revenue that peasants had to pay to the Zamindars. However, it was the revenue rate between the government and the Zamindars that was fixed permanently, not directly between the government and the peasants.

Statement 2 is correct. Under this settlement, the Zamindars were recognized as the owners of the land, giving them the right to collect rent from the peasants.

Statement 3 is not correct. The Permanent Settlement did lead to the commercialization of agriculture, but it was not a direct consequence or intention of the Permanent Settlement.

Statement 4 is not correct. There is no substantial evidence or direct correlation between the Permanent Settlement and the disintegration of the joint family system among the peasantry.