With reference to drip irrigation, which of the following statements is/are correct? 1. Water is delivered at or near the root zone of plants. 2. It is the most efficient method of irrigation as evaporation and run off are minimized. 3. It requires a lot of water to practice drip irrigation Select the correct answer using the codes given below.

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