<prompt> Nasolacrimal duct drains into:Superior meatusEthmoidal bullaInferior meatusMiddle meatus  <response>: 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 Hasners valve. 