This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
After undergoing surgery for Carcinoma of the colon, a patient developed single liver metastasis of 2cm. What is the next line of management? 
Select and explain. 
A. Resection, B. Chemoradiation, C. Acetic acid injection, D. Radiofrequency ablation
A: Resection
Answer: A: Resection 
Explanation: Total resection of the tumor is optimal management when a tumor is detected in the large bowel.The detection of metastases should not preclude surgery in patients with tumor-related symptoms.Radiation therapy to the pelvis is recommended to reduce the 20-25% probability of recurrence of stage II or III tumors after complete surgical resection.Preoperative radiotherapy is indicated for patients with large, potentially unresectable rectal cancers.Systemic therapy has become more effective.5-Fluorouracil remains the backbone of treatment of this disease. It acts as a radiosensitizer when delivered together with radiation therapy.FOLFIRI regimen: Irinotecan with 5-FU and Leucovorin.FOLFOX regimen: leucovorin with 5-FU and Oxaliplatin.MONOCLONAL ANTIBODIES: EGFR Ab -Cetuximab, Panitumumab, VEGF-Bevacimumab.Patients with solitary hepatic metastases without clinical or radiographic evidence of additional tumor involvement should be considered for paial liver resection.(Ref: Harrison's 18/e 773,774)