The correct answer to the question is option 3, Commercial banks. Commercial banks disbursed the maximum credit to the agricultural sector in India between 2006-07 and 2011-12.

Now let`s analyze the other options to better understand why they are not the correct answer:

Option 1, Cooperative banks: While cooperative banks do play a role in providing credit to the agricultural sector, they disbursed a lesser amount compared to commercial banks during the specified time period.

Option 2, Regional rural banks: Regional rural banks also contribute to agricultural credit, but they disbursed a lesser amount compared to commercial banks during the specified time period.

Option 4, Moneylenders: Moneylenders are informal sources of credit and are not regulated like banks. While they do provide credit to the agricultural sector, their disbursement is generally lower compared to the formal banking sector.

It is important to note that the provided answer is generally correct. However, it is always recommended to verify the information from reliable sources to ensure accuracy.