5. Which of the following conditions is normally known as presternal calcification? a. Hydrothorax. b. Ascites. c. Putty brisket. d. Dropsy.

The correct answer is c. Putty brisket.<br /><br />Presternal calcification, also known as putty brisket, is a condition characterized by the deposition of calcium in the subcutaneous tissue of the chest wall. It is commonly seen in older cows and is caused by a combination of factors, including genetics, diet, and age. The condition can lead to the formation of hard, calcified deposits on the skin of the chest, which can affect the cow's mobility and comfort. It is important to note that putty brisket is not a disease but rather a physical sign that may indicate underlying conditions or factors contributing to its development.