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: Pathology
Commonest site of amoebiasis in the gut -a)  Ileumb)  Caecumc)  Ascending colond)  Transverse colone)  Sigmoid colon 
Select and explain. 
A. bc, B. c, C. ac, D. ad
A: bc
Answer: A: bc 
Explanation: E. histolytica forms flask shaped ulcers.
Amebiasis most frequently involves the cecum and ascending colon, followed in order by the sigmoid, rectum, and appendix.