The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Occluded submandibular salivary duct can be best observed by   (A) Palpation   (B) Sialography   (C) Occlusal X-ray   (D) Thermography
['(B) Sialography <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Palpation \n (B) Sialography \n (C) Occlusal X-ray \n (D) Thermography <> possible answers', '  Occluded submandibular salivary duct can be best observed by <> context@']