**Core Concept**
The question is referring to the malignant potential of different types of colorectal polyps. The malignant potential of a polyp is its likelihood of developing into colorectal cancer over time. This concept is crucial in determining the appropriate management strategy for patients with polyps.

**Why the Correct Answer is Right**
The malignant potential of a polyp is determined by its histological type. Among the various types of polyps, hyperplastic polyps have the least malignant potential. This is because they are composed of immature glandular epithelium that has not undergone significant neoplastic transformation. In contrast, adenomatous polyps, which are characterized by dysplastic glandular epithelium, have a higher risk of malignant transformation.

**Why Each Wrong Option is Incorrect**
**Option A:** Villous adenomas have a higher malignant potential compared to hyperplastic polyps due to their more complex architecture and higher degree of dysplasia.
**Option B:** Serrated polyps, including serrated adenomas and sessile serrated lesions, have a significant risk of malignant transformation and are therefore not the polyp with the least malignant potential.
**Option C:** Tubular adenomas have a lower malignant potential compared to villous adenomas, but still a higher risk than hyperplastic polyps.

**Clinical Pearl / High-Yield Fact**
When managing patients with colorectal polyps, it is essential to consider the malignant potential of each type of polyp to determine the appropriate follow-up and treatment strategy.

**Correct Answer: A. Hyperplastic polyps.**