Final answer:
The fourth option, 'An old granuloma has a calcified center,' is NOT an example of dystrophic calcification.
Step-by-step explanation:
The fourth option, 'An old granuloma has a calcified center,' is NOT an example of dystrophic calcification. Dystrophic calcification occurs in response to tissue damage or inflammation, and is characterized by the deposition of calcium salts in areas of dead or dying tissue. This can be seen in conditions such as acute pancreatitis, breast carcinoma, and disordered calcium homeostasis. In the case of an old granuloma, the calcified center is not a result of tissue damage or inflammation, but rather a normal part of the healing process.