**Core Concept**
Subacute spontaneous peritonitis in cirrhosis patients involves an infection of the peritoneal fluid, often due to **translocation of bacteria** from the gut. This condition is a serious complication of **cirrhosis**, characterized by inflammation of the peritoneum. The immune response in such patients is often compromised.

**Why the Correct Answer is Right**
The correct answer choice is not provided, however, in subacute spontaneous peritonitis, the predominant cell type is typically **polymorphonuclear cells (PMNs)**, which are a type of white blood cell. These cells, also known as neutrophils, play a crucial role in the body's defense against infection. The presence of a high number of PMNs in the peritoneal fluid is indicative of a bacterial infection.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific details of option A, it's challenging to provide a precise explanation for its incorrectness.
**Option B:** Similarly, without the specifics, the reasoning for its incorrectness cannot be accurately provided.
**Option C:** And option C, lacking details, cannot be directly addressed as to why it is incorrect.
**Option D:** The same issue applies to option D, as the option text is missing.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that **spontaneous bacterial peritonitis (SBP)**, a condition closely related to subacute spontaneous peritonitis in cirrhosis patients, is diagnosed by the presence of more than **250 polymorphonuclear cells per milliliter** of peritoneal fluid. This is a critical threshold for initiating antibiotic therapy.

**Correct Answer:** Correct Answer: D. > 250 cells/mm³