**Core Concept**
Miliary tuberculosis (TB) is a form of tuberculosis characterized by a wide dissemination into the human body, with a large number of small tubercles or granulomas found in various organs, especially the lungs and liver. This condition is usually caused by the hematogenous spread of Mycobacterium tuberculosis from an initial focus.

**Why the Correct Answer is Right**
The granulomas in miliary TB are small, ranging from 1-2 mm in diameter, which is much smaller than the granulomas found in other forms of TB. This small size is due to the rapid dissemination of the bacteria through the bloodstream, leading to the formation of numerous small tubercles. The granulomas in miliary TB typically do not have a clear edge and are often poorly formed, which makes them difficult to distinguish from other types of inflammation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify the size range of the granulomas in miliary TB.
**Option B:** This option is incorrect because it suggests that the granulomas in miliary TB are larger than those found in other forms of TB.
**Option C:** This option is incorrect because it does not accurately describe the size range of the granulomas in miliary TB.

**Clinical Pearl / High-Yield Fact**
Miliary TB is often associated with a high mortality rate if left untreated, and early diagnosis is crucial for improving patient outcomes. A chest X-ray is a common diagnostic tool for miliary TB, showing a characteristic pattern of diffuse, small nodules.

**Correct Answer:** C.