This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
A 50 year old man suffering from left colon carcinoma. Which of the following is true 
Select and explain. 
A. Apple core deformity, B. Bleed usually, C. Mass is present, D. Liquid stools
A: Apple core deformity
Answer: A: Apple core deformity 
Explanation: None