In the intercuspal position, the lingual cusp of maxillary 2nd premolar contacts the______________?
(A) Distal fossa of mandibular 2ndpremolar
(B) Mesial fossa of mandibular 1st molar
(C) Distal marginal ridge of mandibular 2ndmolar
(D) Distal marginal ridge of mandibular 1st premolar

