This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
Investigation of choice for hydatid disease is 
Select and explain. 
A. CT scan, B. ELISA, C. Biopsy, D. USG
B: ELISA
Answer: B: ELISA 
Explanation: Diagnosis is confirmed by Serological tests for antibodies like ELISA Immunoblot Arc-5 IHA