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: Social & Preventive Medicine
Dates are rich source of- 
Select and explain. 
A. Calcium, B. Iron, C. VitC, D. Carotene
A: Calcium
Answer: A: Calcium 
Explanation: Ans. is 'a' Calcium