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: Pathology
Which of the following is metastatic calcification? 
Select and explain. 
A. Psammoma bodies, B. Rheumatic heart disease, C. Milk alkali syndrome, D. Monckeberg's medial calcific sclerosis
C: Milk alkali syndrome
Answer: C: Milk alkali syndrome 
Explanation: Metastatic calcification occurs when there is raised calcium level.