This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
CNS development begins in which intrauterine week? 
Select and explain. 
A. 5 weeks, B. 6 weeks, C. 3 weeks, D. 2 weeks
C: 3 weeks
Answer: C: 3 weeks 
Explanation: HUMAN EMBRYOLOGY-INDERBIR SINGH TENTH EDITION-PAGE NO:350