<prompt> Safest transplantation approach in liver disease-Directly transplanting embryonic stem cell in the liverTransplanting donor hepatocytes into liverTransplanting mesenchymal stem cell from adipose tissue to liverInjecting erythropoietin into body  <response>: Answer- C. Transplanting mesenchymal stem cell from adipose tissue to liverToday, autologous from the patient adipose tissue stem cell are the only stem cells that have been used clinically for treating liver disease.Many trials have shown that patients with liver cirrhosis have benefitted from autologous adipose tissue derived mesenchymal stem cells 