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
While pronouncing S, T, D, N, Z sounds, tip of tongue makes contact with: 
Select and explain. 
A. Anterior 2/3rd of plate, B. Maxillary canines, C. Inner 2/3rd of lower lip, D. Does not make any contact
A: Anterior 2/3rd of plate
Answer: A: Anterior 2/3rd of plate 
Explanation: Linguopalatal sounds (Anterior Palate):

The linguopalatal sounds are “C (soft), D, T, N, Z and R”
Produced by: When the tip of the tongue contacts the anterior portion of the palate or the lingual side of anterior teeth.
Importance of Linguopalatal sounds: When the denture base in the rugae area is too thick and can produce a similar effect. “S” sounds produced by the position of the tongue so that air stream released through a small gap between tongue and rugae, “S” will sound as “SH” when anterior teeth are anteroposteriorly displaced.