**Core Concept**
Malignant tumors are characterized by their ability to invade surrounding tissues, metastasize to distant sites, and exhibit uncontrolled cell growth. This is in contrast to benign tumors, which are non-cancerous growths that do not invade or metastasize.

**Why the Correct Answer is Right**
The correct answer is a type of tumor that does not exhibit malignant characteristics. Malignant tumors are often associated with genetic mutations that disrupt normal cell growth and division pathways. In contrast, the correct answer represents a type of tumor that is typically non-cancerous and does not harbor these genetic mutations.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is a type of cancerous tumor that exhibits malignant characteristics, such as invasion and metastasis.
**Option B:** This option is also incorrect because it is a type of malignant tumor that arises from the epithelial cells and is known for its aggressive behavior.
**Option C:** This option is incorrect because it is a type of cancerous tumor that arises from the connective tissue and is characterized by its ability to invade and metastasize.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the distinction between benign and malignant tumors lies in their ability to invade and metastasize, rather than their size or growth rate.

**Correct Answer: D. Osteochondroma**