A farmer in a semi-arid area claims that his farming practice is very environment friendly. Which of the following practices on his farm can justify his claim?1. Planning a tree belt.2. Practising crop rotation.3. Carrying out a large scale irrigation system4. Using organic fertilizers.Select the correct answer using the code given below:

• A. 3 and 4 only
• B. 1, 2 and 4
• C. 1, 3 and 4
• D. 1 and 2 only