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
Identity the true statement about Pulmonary embolism: 
Select and explain. 
A. S1 Q3 T3 is the most common ECG finding seen, B. There will be Left axis deviation, C. D-dimer is the gold standard investigation, D. Sinus tachycardia is most common finding on ECG
D: Sinus tachycardia is most common finding on ECG
Answer: D: Sinus tachycardia is most common finding on ECG 
Explanation: S1 Q3 T3 is highly predictive sign but not the most common ECG finding. And there will be right axis deviation.
D-Dimer is best for screening not gold standard investigation.