This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and PNS, Subject name: ENT
[{'content': "Improvement in nasal patency by retracting the lateral part of the cheek and thus testing the vestibular component of nose is - \nSelect and explain. \nA. Epley's maneuver, B. Cottle's test, C. Schwartz maneuver, D. Helmich maneuver", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Cottle's test Cottle's test:* It is used in nasal obstruction due to abnormality of the nasal valve. In this test, cheek is drawn laterally while the patient breathes quietly. If the nasal airway improves on the test side, the test is positive and indicates abnormality of the vestibular component of nasal valve.", 'role': 'assistant'}]