A patient who has a high level of mast cell activity, dilation of blood vessels and acute drop in blood pressure is likely suffering from
" Anaphylactic shock immediately following exposure to allergen"
What is anaphylactic shock?
Anaphylaxis, also known as allergic or anaphylactic shock, is a severe, life-threatening allergic reaction that affects the entire body.
Anaphylaxis is a medical emergency. The airway, respiration, and circulation should all be evaluated very away. CPR may be required.
Hence, the correct answer is option D
Learn more about anaphylaxis here,
https://brainly.com/question/14049395
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