Nasolacrimal duct drains into:
Key Concept:

 The inferior meatus lies underneath the inferior concha, and is the largest of the three meatuses. 
 The nasolacrimal duct opens into it at the junction of its anterior one-third and posterior two-thirds. 
 This opening is guarded by the lacrimal fold, or Hasner’s valve.
Superior meatus
Ethmoidal bulla
Inferior meatus
Middle meatus