This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
[{'content': 'A female patient aged 45 years has multiple non-carious lesions and c/o sensitivity. On examination deep cervical abrasions are seen in all posterior teeth. Intra oral sinus is evident w.r.t. 24 & 25. Gingival recession is present in mandibular anterior teeth with gingival inflammation and bleeding on probing.\n\nAny investigations required? \nSelect and explain. \nA. IOPAR w.r.t. 24 & 25, B. Percussion and palpation test, C. Bite test, D. Pulp vitality tests', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]