This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head & Neck, Subject name: Anatomy
An 11-year-old boy is examined by an ENT doctor for his swollen palatine tonsils. The palatine tonsils are located between the anterior and posterior tonsillar pillars. Which of the following muscles form these pillars? 
Select and explain. 
A. Levator veli palatini and tensor veli palatini, B. Palatoglossus and palatopharyngeus, C. Styloglossus and stylopharyngeus, D. Palatopharyngeus and salpingopharyngeus
B: Palatoglossus and palatopharyngeus
Answer: B: Palatoglossus and palatopharyngeus 
Explanation: The palatine tonsils lie in tonsillar beds with muscular (covered with mucosa) anterior and posterior pillars forming the boundaries of the bed. These pillars are formed by the palatoglossal arch, anteriorly, and the palatopharyngeal arch, posteriorly. The anterior pillar, part of the palatoglossal arch, contains the palatoglossus muscle; the posterior pillar, provided by the palatopharyngeal arch, is formed by the palatopharyngeus muscle.