Answer:
The most common cause of chronic upper airway obstruction in adults is OSA. Less common but potential causes of laryngeal pathology and subsequent airway compromise are tuberculosis, sarcoidosis, granulomatosis with polyangiitis, and Behcet disease.
Explanation:
The one that you've circled (A) is the correct answer.
Crest (equipment) – Heraldic markings on an arrow used for identification or design
I believe it’s A. Birth control patch