Answer:
Embryonic Stem cell
Step-by-step explanation:
Stem cells are the multipotent cell which can give rise to a variety of other cells and can form different tissues. The stem cells are present in the embryo and the well-developed adult organism, therefore, is known as the embryonic stem cell and the adult stem cell.
In the given case, after the blastocyst stage of embryo is formed, the cells present in the inner side of the blastocyst possess the ability to form different organs and therefore are called embryonic stem cells.
Thus, embryonic stem cell is correct