<prompt> A child presents with ewings sarcoma. Histology shows it as one of the small round blue cell tumors. Which of the following gets accumulated in the cells of ewings sarcoma?FactProteoglycanGlysaminoglycanGlycogen  <response>: Microscopy of ewings sarcoma shows, sheets of uniform small, round tumor cells with scanty clear cytoplasm, rich in glycogen. 