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
Adeno carcinoma of gall bladder are always located in -a)  Fundusb)  Neckc) Hartmann's pouchd)  Bile duct 
Select and explain. 
A. ac, B. a, C. ad, D. ab
D: ab
Answer: D: ab 
Explanation: Carcinoma of Gall bladder

Carcinoma of gall bladder are adenocarcinoma.
The most cammon sites of involvement are the fundus and the neck, about 20% involve the lateral walls.
There are two growth patterns.
	(i)  Infiltrating-more common
	(ii) Exophytic