Consider the following statements pertaining to a centrifugal pump 1. The manometric head is the head developed by 2. The suction pipe has, generally, a larger diameter as compared to the discharge pipe. 3. The suction pipe is provided with a foot valve and a strainer. 4. The delivery pipe is provided with a foot valve and a strainer. Of these statements:

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