Answer:
Sphenoidal.
Explanation:
Water's method is a medical technique used for the production of the maxillary sinuses and facial bones. The 37 degree angle forms with the orbitomeatal line and the plane of image receptor.
Sphenoidal sinus group can be demonstrated with the patient as position for the parietoacanthal projection. The projection with CR is directed through when the patient's mouth is open.
Thus, the correct answer is option (D).
