<prompt> TRUE about medulloblastoma is -Highly radiosensitiveSurgery is the only treatmentOccurs in adult age groupChemotherapy is useful  <response>: Ans is a i.e. Highly radiosensitive Lets see each option one by one Option c - Medulloblastoma occurs predominantly in children. Option a b Medulloblastoma is a highly malignant tumor and the prognosis for untreated patients is dismal, but it is an exquisitely radiosensitive tumor. - Its treatment involves aggressive surgical removal of tumor followed by irradiation of the brain. Option d i.e. Chemotherapy is useful - We had always thought this option to be wrong, but Schwaz surgery says that Chemotherapy is commonly used as well. - Still we would go with option a as medulloblastoma is well known to be a highly radiosensitive tumor. 