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
Infra-abdominal calcificaition in a plane X-ray abdomen is most often seen in - 
Select and explain. 
A. Meconium ileus, B. Meconium peritonitis, C. Meconium plug syndrome, D. Necrotising enterocolitis
B: Meconium peritonitis
Answer: B: Meconium peritonitis 
Explanation: Ans. is 'b' i.e., Meconium peritonitis