Answer:
D. Amniotic fluid
Explanation:
Stem cells are the undifferentiated cells that can be induced to undergo differentiation. Stem cells undergo cell division and form the new cells which can be differentiated into any specific cell type as per the requirement of the body.
Amniotic fluid is the fluid present in the amniotic cavity and is derived from maternal blood mostly. Amniotic fluid has stem cells that can be differentiated into any cell type. The cells in muscle, brain, and heart are the differentiated cells and perform specific functions.
