**Core Concept**
Psammoma bodies are small, round, laminated calcifications found in certain neoplastic and non-neoplastic lesions. They are a type of dystrophic calcification, which occurs in damaged or dead tissue.

**Why the Correct Answer is Right**
Psammoma bodies are characteristic of papillary thyroid carcinoma and serous ovarian cystadenocarcinoma. The laminated appearance of psammoma bodies is due to the concentric layers of calcium phosphate deposition within the necrotic tissue. This type of calcification is a result of the body's attempt to repair the damaged tissue, leading to the formation of these characteristic structures.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is likely referring to metastatic calcification, which occurs in the presence of elevated serum calcium levels. However, psammoma bodies are not a result of metastatic calcification.
* **Option B:** This option might be referring to idiopathic calcification, which is a rare condition without a known cause. However, psammoma bodies are a specific type of calcification associated with certain neoplastic lesions.
* **Option D:** This option is likely referring to dystrophic calcification in general, which is a broader category that includes psammoma bodies. However, the question is asking for a specific type of calcification associated with psammoma bodies.

**Clinical Pearl / High-Yield Fact**
Psammoma bodies are a characteristic feature of papillary thyroid carcinoma, and their presence can aid in the diagnosis of this condition. They are typically found in the stroma of the tumor and can be identified on histopathological examination.

**Correct Answer: C. Dystrophic calcification.**