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
Birth and death registration should be done within how many days? 
Select and explain. 
A. 21 and 21 respectively, B. 7 and 14 respectively, C. 7 and 21 respectively, D. 14 and 7 respectively
A: 21 and 21 respectively
Answer: A: 21 and 21 respectively 
Explanation: None