This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'Disadvantage of Somatic stem cells is \nSelect and explain. \nA. Limited availability, B. Poor expansion in vitro, C. Limited pluripotency, D. Ethical concerns', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Somatic stem cells are easily available, have good expansion in vitro, low risk of malignancyNo ethical concerns (not taken from foetus, embryo and mostly used for autologus tissues)Main disadvantage is limited pluripotencyRef: Bailey and Love 27e pg: 34', 'role': 'assistant'}]