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
Calculate the deficit for a 60 kg person,with Hb - 5 g/dl add 1000 mg for iron stores. 
Select and explain. 
A. 1500, B. 2500, C. 3500, D. 4000
B: 2500
Answer: B: 2500 
Explanation: Iron deficit = Bodyweight(kg) x 2.3 x (15 - Hb) + 1000
      = 60 x 2.3 x (15 - 5) + 1000
      = 2380 (close to 2500)