Final answer:
Induced pluripotent stem cells (iPSC) can be derived from a differentiated somatic skin cell. iPSCs are created by reprogramming adult cells to regain the ability to differentiate into various cell types.
Step-by-step explanation:
The starting cell for induced pluripotent stem cells (iPSC) can be a) a differentiated somatic skin cell. iPSCs are created by reprogramming adult cells, such as skin cells, to return to a pluripotent state similar to embryonic stem cells. This reprogramming is usually done by introducing specific genes into the adult cells, which allows them to regain the ability to differentiate into various cell types.