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
Most common type of renal stone is: March 2013 (d) 
Select and explain. 
A. Calcium phosphate, B. Magnesium ammonium phosphate, C. Cystine, D. Uric acid
A: Calcium phosphate
Answer: A: Calcium phosphate 
Explanation: Ans. A i.e. Calcium Phosphate