**Core Concept**
The mechanism of hormone action involves the interaction between hormones and specific phospholipids in cell membranes, leading to the activation of various signaling pathways. This interaction is crucial for the transmission of hormonal signals across cell membranes.

**Why the Correct Answer is Right**
The correct phospholipid associated with the mechanism of hormone action is phosphatidylinositol 4,5-bisphosphate (PIP2). When a hormone binds to its receptor, it triggers the activation of phospholipase C (PLC), which cleaves PIP2 into inositol 1,4,5-trisphosphate (IP3) and diacylglycerol (DAG). IP3 triggers the release of calcium ions from the endoplasmic reticulum, while DAG activates protein kinase C (PKC), leading to the activation of various downstream signaling pathways. This process is essential for the regulation of various cellular processes, including cell growth, differentiation, and metabolism.

**Why Each Wrong Option is Incorrect**
**Option A:** None provided, skipping to Option B.
**Option B:** Phosphatidylserine is a phospholipid, but it is not directly involved in the mechanism of hormone action.
**Option C:** None provided, skipping to Option D.
**Option D:** None provided, skipping to the Clinical Pearl section.

**Clinical Pearl / High-Yield Fact**
The phospholipase C pathway is a key mechanism of hormone action, and its dysregulation has been implicated in various diseases, including cancer and cardiovascular disease. Understanding the role of PIP2 in hormone signaling is essential for appreciating the molecular mechanisms underlying these diseases.

**Correct Answer:** D.