This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
Posterior relation of neck of pancreas 
Select and explain. 
A. IVC, B. Origin of porntal vein, C. Aoa, D. Common bile duct
B: Origin of porntal vein
Answer: B: Origin of porntal vein 
Explanation: The frontal vein (supratrochlear vein) begins on the forehead in a venous plexus which communicates with the frontal branches of the superficial temporal vein. The veins converge to form a single trunk, which runs downward near the middle line of the forehead parallel with the vein of the opposite side. The two veins are joined, at the root of the nose, by a transverse branch, called the nasal arch, which receives some small veins from the dorsum of the nose. At the root of the nose the veins diverge, and, each at the medial angle of the orbit, joins the supraorbital vein, to form the angular vein. Ref - BDC 6e vol2 pg 298-300