<prompt> A unilateral mass causing nasal obstruction is seen in the nose of the patient. The most probable diagnosis is -RhinophymaAntrochoanal polypFuruncleAtrophic rhinitis  <response>: Ans. is d i.e., Antrochoanal polyp Common cause of unilateral nasal obstruction VestibuleNasal cavityNasopharynx Furuncle Vestibulitis Sternosis of nares Atresia Nasoalveolar cyst Papilloma Squamous cell carcinoma Foreign body Deviated nasal septum DNS Hypertrophic turbinates Concha bullosa Antrochoanal polyp Synechia Rhinolith Bleeding polyps of septum Benign and malignant tumours of nose and paranasal sinuses Sinusitis, unilateral Unilateral choanal atresia 