## **Core Concept**
The question pertains to the cellular infiltrate present in the early stages of gingivitis, specifically stage 1. Gingivitis is an inflammatory condition of the gingiva, primarily caused by the accumulation of dental plaque. The initial immune response involves the infiltration of various types of cells.

## **Why the Correct Answer is Right**
In stage 1 of gingivitis, the predominant cells are **neutrophils**. These cells are among the first line of defense in the innate immune response and play a crucial role in combating infections, including those caused by the bacteria present in dental plaque. Neutrophils are characterized by their multilobed nucleus and the presence of granules in their cytoplasm, which contain enzymes and antimicrobial peptides.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because, although other types of cells like lymphocytes and plasma cells do play roles in the progression of gingivitis, they are not the predominant cells in stage 1.
- **Option B:** This option might suggest another type of cell; however, without specific details, it's understood that the correct answer focuses on neutrophils, making other cell types incorrect in this context.
- **Option D:** Similarly, this option would represent incorrect cell types for the predominant infiltration in stage 1 of gingivitis.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the progression of gingivitis involves an initial acute phase dominated by **neutrophils**, followed by a more chronic phase with increased presence of **lymphocytes** and **plasma cells**. This sequence is critical for understanding the pathogenesis of periodontal diseases.

## **Correct Answer:** .