**Core Concept**
The presence of a **torus palatinus** in the maxillary arch affects the design of a major connector in removable partial dentures. A **torus palatinus** is a bony growth in the midline of the hard palate. The major connector should be designed to avoid interference with the torus.

**Why the Correct Answer is Right**
Since the torus must not be removed, the major connector should be designed to avoid covering or putting pressure on it, which could cause discomfort or irritation. A **plate** design, which is a type of major connector, can be modified to bypass the torus, ensuring patient comfort and preventing irritation.

**Why Each Wrong Option is Incorrect**
**Option A:** Is incorrect because a specific type of connector that avoids the torus is needed, but this option does not specify how it accommodates the torus.
**Option B:** Does not provide a clear solution for avoiding the torus.
**Option D:** Is incorrect as it doesn't directly address the need to bypass the torus.

**Clinical Pearl / High-Yield Fact**
In denture design, especially for patients with a **torus palatinus**, it's crucial to select a major connector that does not cover the torus to avoid patient discomfort and ensure proper fit and function of the denture.

**Correct Answer:** D. Plate major connector