This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Which of the following is not a component of mackler's triad for esophageal perforation 
Select and explain. 
A. Chest pain, B. Vomiting, C. Subcutaneous emphysema, D. Aspirational pneumonitis
D: Aspirational pneumonitis
Answer: D: Aspirational pneumonitis 
Explanation: Mackler’s triad consists of chest pain, vomiting and subcutaneous emphysema.