This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular Embryology& Anatomy, Subject name: Ophthalmology
Inferior orbital fissure is between which 2 walls of orbit: 
Select and explain. 
A. Roof and medial, B. Lateral and floor, C. Floor and medial, D. Roof and lateral
B: Lateral and floor
Answer: B: Lateral and floor 
Explanation: Inferior orbital fissure is formed between the greater wing of the sphenoid (lateral wall) and maxilla (Floor)runs posterolaterally It transmits the zygomatic branch of the maxillary nerve and the ascending branches from the pterygopalatine ganglion The infraorbital vessels are found in the inferior orbital fissure and travel down the infraorbital groove into the infraorbital canal and exit through the infraorbital foramen Inferior division of ophthalmic vein passes through the inferior orbital fissure. No. 6 is Inferior Orbital fissure No. 3 is Superior Orbital fissure