Q. Consider the following sources of stem cells:
1.Umbilical cord blood and Wharton’s jelly.
2.Genetically reprogrammed adult somatic cells (Induced Pluripotent Stem Cells).
3.Mature red blood cells circulating in the heart.
Which of the sources mentioned above can be utilized for stem cell therapy?

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: A
Notes:

Explanation:

  • Sources 1 and 2 are correct: Fetal tissues (like the cord) and reprogrammed somatic cells are major sources.
  • Source 3 is incorrect: Mature red blood cells are specialized (differentiated) and do not have a nucleus or the ability to act as stem cells.
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