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: Anatomy
Boa's sign seen in 
Select and explain. 
A. Acute cholangitis, B. Acute Cholecystitis, C. Mirizzi syndrome, D. Primary sclerosing cholangitis
B: Acute Cholecystitis
Answer: B: Acute Cholecystitis 
Explanation: Boas' or Boas's sign is hyperaesthesia (increased or altered sensitivity) below the right scapula is a symptom of acute cholecystitis