All are pneumatization patterns ot sphenoid sinus except:: (A) Pre sellar, (B) Post sellar, (C) Concha bullosa, (D) Conchal
Answer is C. Three types of sphenoid sinus pneumatization patterns have been found.Pneumatisation patterns depend on the position of thr sinus in relation to the sella turcica. Ref Dhingra 6/e,p 188.