**Core Concept**
Acute inflammation is a rapid, non-specific response of the body to tissue damage or infection, characterized by the activation of the immune system and the release of chemical mediators. The primary goal of acute inflammation is to eliminate the injurious stimulus and initiate the healing process.

**Why the Correct Answer is Right**
Granuloma formation is a hallmark of chronic inflammation, not acute inflammation. In chronic inflammation, a granuloma is a specific type of tissue reaction that occurs in response to persistent infection or foreign material, such as in tuberculosis or sarcoidosis. The formation of granulomas involves the aggregation of macrophages and other immune cells, which attempt to wall off the offending agent and prevent its spread.

**Why Each Wrong Option is Incorrect**
**Option A:** Vasodilation is a key component of acute inflammation, leading to increased blood flow and the delivery of white blood cells to the affected area.
**Option B:** Exudation, or the leakage of fluid from blood vessels into the interstitial space, is another critical feature of acute inflammation, contributing to the swelling and redness characteristic of inflammation.
**Option C:** Neutrophilic response is a common feature of acute inflammation, as neutrophils are among the first white blood cells to arrive at the site of injury or infection.

**Clinical Pearl / High-Yield Fact**
In acute inflammation, the classic signs of inflammation (rubor, calor, dolor, and tumor) are due to the increased blood flow and vascular permeability caused by the release of chemical mediators such as histamine and bradykinin.

**✓ Correct Answer: D. Granuloma formation**