<prompt> A 50-year-old male, working as a hotel cook, has four dependent family members. He has been diagnosed with an early stage squamous cell cancer of the anal canal. He has more than 60 chances of cure. The best treatment option isAbdomino-perineal resectionCombined surgery and radiotherapyCombined chemotherapy and radiotherapyChemotherapy alone  <response>: A combination of chemotherapy and radiotherapy called as chemoradiation is the preferred initial therapy for all anal canal tumors 