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
True about duplication of intestine is -a) Spherical type is MCb) Tubular type is attached longitudinally with bowelc) Spherical cyst communicates with lumend) All of the above 
Select and explain. 
A. ab, B. a, C. ad, D. bc
A: ab
Answer: A: ab 
Explanation: None