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
A patient undergoes thyroid surgery, following which he develops perioral tingling. Blood Ca is 8.9 meq; Next step is - 
Select and explain. 
A. Vit D orally, B. Oral Ca and vit D, C. Intravenous calcium gluconate and serial monitoring, D. Wait for Ca to decrease to < 7.0 before taking further action.
B: Oral Ca and vit D
Answer: B: Oral Ca and vit D 
Explanation: None