**Core Concept**
Fine-needle aspiration cytology (FNAC) is a diagnostic tool used to examine the cellular morphology of lesions. It relies on the sampling of cells from the target tissue, which are then analyzed to determine the nature of the lesion. However, FNAC has limitations in its ability to accurately diagnose certain types of lesions due to the sampling technique and limitations in cellular morphology evaluation.

**Why the Correct Answer is Right**
FNAC is particularly challenging in detecting calcifications, which are deposits of calcium salts in tissues. The presence of calcifications can be an important diagnostic clue for certain types of tumors, such as osteosarcoma or calcifying epithelioma. However, FNAC may not be able to detect calcifications due to the physical properties of the sample, which can lead to fragmentation or dislodgment of the calcified material during the sampling process. As a result, the cytological features of calcification may not be evident on FNAC samples.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided, so we cannot evaluate its incorrectness.
**Option B:** This option is not provided, so we cannot evaluate its incorrectness.
**Option C:** This option is not provided, so we cannot evaluate its incorrectness.
**Option D:** This option is not provided, so we cannot evaluate its incorrectness.

**Clinical Pearl / High-Yield Fact**
When interpreting FNAC results, it's essential to consider the limitations of the technique, particularly in cases where calcifications or other specific features are suspected. A thorough clinical evaluation and correlation with imaging studies can help to provide a more accurate diagnosis.

**Correct Answer:** A, B, C, D.