**Core Concept**
The small bowel in a full-term newborn is a critical component of the gastrointestinal tract, responsible for nutrient absorption. The length of the small bowel is an important anatomical parameter that varies across different age groups and species.

**Why the Correct Answer is Right**
The small bowel in a full-term newborn is approximately 120-150 cm in length. This length allows for optimal absorption of nutrients and is essential for the newborn's growth and development. The small bowel is highly adaptable, and its length can change in response to various physiological and pathological conditions. In adults, the small bowel is shorter, approximately 6-7 meters in length.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as the length of the small bowel in a full-term newborn is not typically around 100 cm.
**Option B:** This option is incorrect as the length of the small bowel in a full-term newborn is not typically around 10 cm.
**Option C:** This option is incorrect as the length of the small bowel in a full-term newborn is not typically around 200 cm.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that the length of the small bowel can change in response to various conditions, such as intestinal obstruction or cancer. A significant change in small bowel length can lead to malabsorption and other gastrointestinal symptoms.

**Correct Answer: A. 120-150 cm.**