A 8 yrs old boy presented with swelling in the left eye of 3 months duration,examination revealed proptosis of left eye with preserved vision.Right eye is normal.CT scan revealed intraorbital extra conal mass lesion.Biopsy revealed embryonal rhabdomyosarcoma.Metastatic work up was normal.The standard line of treatment is

• A. Chemotherapy only
• B. Wide local excision
• C. Enucleation
• D. Chemotherapy and Radiation therapy