The correct answer is option 3: 1, 2 and 3.

Let`s dissect each option to understand why it is correct or incorrect:

Option 1 includes greater attention to land reforms. Land reforms aim to provide fair and equal access to land, improve land productivity, and reduce inequality in land ownership. This is an important strategy to raise agricultural output as it ensures that land is being utilized efficiently and effectively.

Option 2 includes double the rate of growth of irrigated area. Increasing the irrigated area is crucial for agricultural productivity as it provides a steady and reliable water supply for crops. This helps in increasing crop yields and improving overall agricultural output.

Option 3 includes promoting animal husbandry and fishery. Animal husbandry and fishery are important sectors of agriculture that contribute to increased agricultural output. These sectors provide a source of income and diversification for farmers, and also contribute to food security and nutrition.

Option 4 includes interest-free credit to farmers. While providing credit to farmers can be beneficial for agricultural development, it is not specifically mentioned in the question as part of the 11th Five Year Plan strategy to raise agricultural output. Therefore, this option is incorrect.

To summarize, the correct answer is option 3 as it correctly includes the strategies of