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: Dental
Interim obturator in cleft palate patients is placed at what time? 
Select and explain. 
A. After 7 days of surgery, B. After 2-6 weeks of surgery, C. After 2-4 months of surgery, D. None of the above
B: After 2-6 weeks of surgery
Answer: B: After 2-6 weeks of surgery 
Explanation: Interim obturator:

Form during 2nd phase of post-surgical prosthodontic treatment.
Formed after 2-6 weeks postsurgically.
Main objective is to provide patient comfort & easy function till healing.
In small defects, in which patient is able to function normally with immediate surgical obturator, this interim obturator is not necessary.
Final definitive prosthesis made after 3-6 months post-surgery (Third phase)