True regarding surface anatomy of internal jugular vein
Internal jugular vein is marked by a broad line by joining these two points: The first point on the neck medial to the lobule of the ear The second point at the medial end of the clavicle Ref BDC volume 3,Sixth edition pg 303
Line passing from ear lobule to mid pt of clavicle
Line passing from ear lobule to medial end of clavicle
Line joining ear lobule to lateral end of clavicle
Line joining mastoid process to mid pt of clavicle
Head and neck