This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'All are features of anterior interosseous nerve (AIN) syndrome except NOT RELATED \nSelect and explain. \nA. There is sensory loss on the medial 2 fingers, B. Inability to perform OK-sign (approximate thumb and tip of index finger), C. AIN is entrapped under pronator teres, flexor digitorum profundus, flexor carpi radialis, D. Conservative treatment generally, surgery rarely', 'role': 'user'}, {'content': 'Answer: A \nExplanation: There is sensory loss on the medial 2 fingersThere is no sensory impairment in anterior interossous nerve (AIN) syndrome.', 'role': 'assistant'}]