<prompt> Which of the following statements is true for Nigros regimen?It is a regimen for anal canal neoplasmIt incorporates chemotherapy with radiation as an alternative to surgeryHas the advantage of preserving continenceAll of the above  <response>: Nigro regimen is a Combined Modality Therapy CMT for malignant tumors of the anal canal. Nigro regimen comprises of combined chemotherapy and radiotherapy chemoradiation for primary treatment of malignant tumors of the anal canal. Ref: Bailey and Loves Sho Practice of Surgery, 25th Edition, Page 1269; Clinical Scenarios In Surgical Oncology By Vijay P. Khatri, Page 167 