<prompt> Which of the following passes through the foramen Magnum ?veebral aerysympathetic chaininternal carotid aeryXI cranial nerve  <response>: The veebral aeries - The veebral aery on each side is a branch of first pa of subclan aery. its course is divided into 4 pas : 1 1st pa lies from its origin to the foramen transversarium of 6th cervical veebra, 2 2nd pa courses through formen transversarium of 6th to 1st cervical veebra, 3 3rd pa lies on the posterior arch of atlas veebra, 4 4th pa of the veebral aery enters the cranium through foramen magnum under the free margin of posterior atlanto-occipital membrane. REF : B D Chaurasias Human Anatomy , seventh edition , volume 2 , pg. no., 168. 