Consider the following statements regarding anchorage of pipelines conveying water :1. At bends, pipes tend to pull apart2. At bends, forces exerted on the joints due to longitudinal shearing stresses are enormous and the joints may get loosened3. To avoid problems by hydrodynamic effects, pipes are anchored using concrete blocks which absorb side thrusts at bends4. Pipes are also anchored on steep slopesWhich of the above statements are correct?

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