The following are multiple choice questions (with answers) about medical knowledge.   **Question:** According to WHO classiﬁcation of periapical pathology, sinus to oral cavity comes  under:   (A) 4.6   (B) 4.6   (C) 4.61   (D) 4.62
['(D) 4.62 <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 4.6 \n (B) 4.6 \n (C) 4.61 \n (D) 4.62 <> possible answers', '  According to WHO classiﬁcation of periapical pathology, sinus to oral cavity comes  under: <> context@']