**Core Concept**
Acid phosphatase is a type of lysosomal enzyme involved in the breakdown of proteins and phospholipids. It is present in various cells, but its specificity to certain cell types is crucial for clinical diagnosis.

**Why the Correct Answer is Right**
The correct answer is prostate cells. Acid phosphatase is highly specific to prostatic tissue, making it a valuable marker for diagnosing prostate cancer. Elevated levels of acid phosphatase in the blood or prostatic fluid are often associated with prostate cancer or benign prostatic hyperplasia. This enzyme is localized in the secretory cells of the prostate gland, including the epithelial cells and the stromal cells.

**Why Each Wrong Option is Incorrect**
**Option A:** Red blood cells - Acid phosphatase is not specific to red blood cells, although they do contain various enzymes, including acid phosphatase.

**Option B:** Neutrophils - While neutrophils contain various lysosomal enzymes, acid phosphatase is not a specific marker for these cells.

**Option C:** Hepatocytes - Hepatocytes contain a range of enzymes, but acid phosphatase is not a specific marker for liver cells.

**Clinical Pearl / High-Yield Fact**
Remember that elevated acid phosphatase levels can be seen in conditions other than prostate cancer, such as benign prostatic hyperplasia, testicular cancer, and bone metastases. A high index of suspicion and correlation with other diagnostic findings are essential for accurate diagnosis.

**Correct Answer:** C. Hepatocytes