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: Medicine
Regarding medullary sponge kidney-a) Autosomal dominantb) Nephrocalcinosisc) Minimal proteinuriad) More common in females 
Select and explain. 
A. acd, B. abd, C. abc, D. ab
C: abc
Answer: C: abc 
Explanation: None