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: Radiology
Medusa lock appearance in X-ray is seen in: 
Select and explain. 
A. Ascariasis, B. Tapeworm, C. Hook worm, D. Ascaries and tapeworm
A: Ascariasis
Answer: A: Ascariasis 
Explanation: Ans. Ascariasis