The umbilical cord contains which of the following:

Explanation

The correct answer is cord blood stem cells. The umbilical cord contains blood stem cells, specifically referred to as cord blood stem cells, which are harvested from the cord blood. These cells are important due to their potential for use in medical treatments, such as regenerative therapies and transplants. Pluripotent stem cells, while capable of differentiating into any cell type, are generally associated with embryonic sources, not the umbilical cord. Therefore, the presence of pluripotent stem cells is not characteristic of the umbilical cord's contents, making Option A incorrect. Similarly, while blood stem cells are present, the term 'cord blood stem cells' is more specific and accurate, which is why Option C is the correct choice. Option D is incorrect because it suggests the presence of pluripotent stem cells in the umbilical cord, which is misleading.