**Core Concept**
The question is asking about the type of artificial tooth form that results in less horizontal pressure during mastication. This is related to the concept of occlusal schemes and the distribution of forces on the dentition.

**Why the Correct Answer is Right**
Artificial teeth forms that distribute forces more evenly across the dentition are associated with less horizontal pressure. The correct answer is a **Cuspido-gingival** form, which has a more tapered shape with a smaller occlusal surface area. This results in a more even distribution of forces, leading to less horizontal pressure. The cuspido-gingival form is designed to reduce the lateral forces on the teeth, which can lead to wear and tear.

**Why Each Wrong Option is Incorrect**
**Option A:** The **Cuspido-occlusal** form has a larger occlusal surface area, which can concentrate forces and lead to increased horizontal pressure.
**Option B:** The **Gingivo-cuspid** form has a more bulbous shape, which can lead to increased lateral forces on the teeth and higher horizontal pressure.
**Option C:** The **Modified cuspido-gingival** form may not be as effective in distributing forces evenly as the traditional cuspido-gingival form.

**Clinical Pearl / High-Yield Fact**
When designing artificial teeth, it's essential to consider the distribution of forces to prevent wear and tear on the dentition. A cuspido-gingival form can help reduce horizontal pressure and promote a more even occlusal relationship.

**Correct Answer:** C. Cuspido-gingival