This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: ENT
A suspected case of Dysphagia lusoria should be best investigated by 
Select and explain. 
A. HRCT, B. Spiral CT, C. MRA, D. DSA
C: MRA
Answer: C: MRA 
Explanation: Barium swallow, bronchoscopy, or angiographies are investigations to diagnose but angiography is diagnostic. Ref : ENT textbook by Dhingra 6th edition Pgno : 447