1. The optic nerve (A) enters the posterior pole ofthe eyeball. (B) is nourished by the aqueous…

1. The optic nerve (A) enters the posterior pole ofthe eyeball. (B) is nourished by the aqueous humour. (C) has a covering of three meningeal layers. (D) enters the orbit throu ^ the superior orbital fissure. (E) has none of the above properties. 2. The naso-lacrimal duct opens into (A) the hiatus semilunaris. (B) the middle meatus. (C) the infundibulum. (D) the atrium. (E) none of the above. 3. The naso-lacrimal duct opens into the (A) ethmoidal sinuses. (B) maxillary sinus. (C) superior meatus. (D) inferior meatus. (E) middle meatus.