Dentin islands are frequently found in the root canals of which of the following permanent teeth ?
(A) Maxillary lateral incisor & mandibular canine
(B) Maxillary 2nd premolar & maxillary 1st molar
(C) Maxillary 2nd premolar & mandibular canine
(D) Maxillary 1st molar & mandibular 2nd premolar

