This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hand Injuries, Subject name: Orthopaedics
[{'content': 'You are posted as an intern in causality. Which among the following patients with fracture will be your 1st priority to call ortho PG and inform? \nSelect and explain. \nA. Patients finger is blackening, B. Patient cannot extend his arm, C. A 10 cm abrasion, D. Intra-articular fracture of elbow joint', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. Patient s finger is blackening', 'role': 'assistant'}]