This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
Which of the following is in anterior relation to the head of pancreas? 
Select and explain. 
A. Common bile duct, B. Gastroduodenal aery, C. Inferior vena cava, D. Aoa
B: Gastroduodenal aery
Answer: B: Gastroduodenal aery 
Explanation: .