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
In which of the following conditions acquired (secondary) megacolon is seen? 
Select and explain. 
A. Fissure in-ano, B. Complete absence of parasympathetic ganglion cells, C. Absence of sympathetic ganglion cells, D. Rectal malignancy
D: Rectal malignancy
Answer: D: Rectal malignancy 
Explanation: None