Surface marking of internal jugular vein is by joining two points between ?

• A. Medial end of clavicle to point of neck medial to lobule of ear
• B. Upper part of the sternal end of the clavicle to a point midway between the tip of the mastoid process and the angle of the mandible
• C. Sternoclavicular articulation to the middle of the clavicle
• D. Angle of the mandible to the middle of the clavicle