**Core Concept**
Inlay cast metal fabrication involves creating dental restorations by pouring a metal alloy into a mold. The type of wax used in this process is crucial for achieving the desired shape and accuracy. The wax should have a high melting point, be easy to carve, and not stick to the metal.

**Why the Correct Answer is Right**
The correct wax used in inlay cast metal fabrication is **Modeling Compound Wax**. This type of wax has a high melting point, making it ideal for creating detailed impressions of the dental restoration. It also has a low flow rate, which allows for precise shaping and carving. The modeling compound wax does not stick to the metal, making it easy to remove and create a precise fit.

**Why Each Wrong Option is Incorrect**
**Option A:** **Plaster of Paris** is not suitable for inlay cast metal fabrication as it has a low melting point and is prone to cracking. It would not provide a precise impression of the dental restoration.
**Option B:** **Gypsum** is used in dental impressions, but it is not the correct wax for inlay cast metal fabrication. Gypsum has a lower melting point than modeling compound wax and would not provide the necessary accuracy.
**Option C:** **Beeswax** is not used in inlay cast metal fabrication as it has a low melting point and is not suitable for creating detailed impressions. It would not provide a precise fit for the metal restoration.

**Clinical Pearl / High-Yield Fact**
Remember that the type of wax used in inlay cast metal fabrication can affect the accuracy and precision of the dental restoration. Always choose a wax with a high melting point and low flow rate to ensure a precise fit.

**Correct Answer:** D.