<prompt> Which of the following is a radio-resistant tumor?Ewings sarcomaMalignant fibrous histiocytomaSeminomaDysgerminoma  <response>: Malignant fibrous histiocytoma is a soft tissue sarcoma. 10 of it occur in the head and neck. It mostly occur in adults 50-60 years of age. It has poor prognosis. Has high rate of recurrence following surgery. It is radioresistant and does not respond to chemotherapy. 