This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal system, Subject name: Radiology
Multiple punched out lesions on skull X-ray is found in - 
Select and explain. 
A. Down's, B. Hyperparathyroidism, C. Multiple myeloma, D. All
C: Multiple myeloma
Answer: C: Multiple myeloma 
Explanation: Radiological features for multiple myeloma are : Multiple punched lytic lesions of skull with endosteal scalloping. Expansile lytic lesions with associated soft tissue masses Absence of periosteal new bone formation