The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 42-year-old man presents to a neurologist for evaluation of severe headache. He started experiencing episodic headaches and palpitations 3 months ago; however, he thought that these symptoms were simply related to the stress of moving and starting a new job. He has continued to experience these intermittent headaches and has also noticed that he sweats profusely during these episodes. On presentation his temperature is 99.1°F (37.3°C), blood pressure is 163/112 mmHg, pulse is 112/min, and respirations are 15/min. Physical exam reveals pallor and perspiration but is otherwise unremarkable. The most likely cause of this patient's symptoms is produced by cells located in which region of the histology slide shown in figure A?   (A) A   (B) B   (C) C   (D) E
['(D) E <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) A \n (B) B \n (C) C \n (D) E <> possible answers', "  A 42-year-old man presents to a neurologist for evaluation of severe headache. He started experiencing episodic headaches and palpitations 3 months ago; however, he thought that these symptoms were simply related to the stress of moving and starting a new job. He has continued to experience these intermittent headaches and has also noticed that he sweats profusely during these episodes. On presentation his temperature is 99.1°F (37.3°C), blood pressure is 163/112 mmHg, pulse is 112/min, and respirations are 15/min. Physical exam reveals pallor and perspiration but is otherwise unremarkable. The most likely cause of this patient's symptoms is produced by cells located in which region of the histology slide shown in figure A? <> context@"]