**Core Concept**
Meckel's diverticulum is a congenital anomaly of the small intestine, resulting from the incomplete closure of the vitelline duct during embryonic development. It is a true diverticulum, containing all layers of the intestinal wall.

**Why the Correct Answer is Right**
Meckel's diverticulum is a true diverticulum because it contains all layers of the intestinal wall, including the muscularis propria. This is in contrast to a false diverticulum, which only contains mucosa and submucosa. The presence of all layers makes Meckel's diverticulum more prone to complications such as bleeding, obstruction, and perforation.

**Why Each Wrong Option is Incorrect**
**Option A:** This statement is true. Meckel's diverticulum is a true diverticulum.
**Option B:** This statement is true. Meckel's diverticulum is a congenital anomaly resulting from the incomplete closure of the vitelline duct.
**Option C:** This statement is false. A false diverticulum, also known as a pseudodiverticulum, only contains mucosa and submucosa, whereas Meckel's diverticulum contains all layers of the intestinal wall.

**Clinical Pearl / High-Yield Fact**
Meckel's diverticulum is a common cause of gastrointestinal bleeding in children, and its presence should be suspected in cases of recurrent or unexplained bleeding.

**Correct Answer: C. A false diverticulum only contains mucosa and submucosa.**